Dallas Cowboys fan here. The teams I hate the most are:
NY Giants: Mild hate
Washington Redskins: Strong hate, but a respected rival
Philadelphia Eagles: I hate them with a passion. They are low class thugs with fans who boo Santa Claus, throw D batteries at opponents, need a jail in their stadium, and cheer when opposing players suffer serious injuries. Their uniforms are terrible too… almost as bad as the Bengals. :mad:
The Boston Red Sox. When Jim Eisenreich was with the Royals and his Tourette’s condition became known, Fenway fans chanted “shake… shake” to him. They’re a bunch of pathetic whiners and I’m actually happy they won it once just so they might finally stop acting like victims.
The entire SEC. A bigger bunch of arrogant asses can’t be found.
Any NHL team that is neither from the Original Six nor Canada.
The Dallas Cowboys, but now being threatened by the Patriots for the most despicable football team.
The only team I think I hate more than the Dallas Cowboys would be the Chicago Cubs. And it is a hate that has festered for many many years - and burns with the fire of 1,000 suns.
I hate the Browns, Bengals, and Ravens. 
**Mid-80’s to Mid-90’s:**San Francisco 49ers, because Chris Berman wouldn’t shut up about them
**Mid-90’s to 2002:**Green Bay Packers, because Chris Berman wouldn’t shut up about them
**2002 - present day:**New England Patriots, because Chris Berman won’t shut up about them 
As a Laker Fan, I have a healthy loathing for the Boston Celtics coded in my DNA; but, as an NBA fan, I have a great deal of respect for them, and I think it good that they are having a resurgance.
That said, I still hate Danny Ainge with a passion normally reserved for blood enemies and telemarketers.
William Shatner hates the Yankees! 
Oh, and I hate the NY Jets.
I’ve lived on the Minn/Wisconi border for most of my life and that has culled in me an unholy hatred for the Vikings. From the fair weather fans, to the incessant owner bitching, the never ending non winning season apologists, the KFAN propaganda machine, the lack of any out of state sports team coverage in the the only two newspapers I can get, the bandwagon drunkards that get in your face IF their team manages to get a first down but will invariably leave the bar in the 3rd quarter when they’re down by 7, that fucking horn that sounds even when the Vikings recover their own fumble, and finally the color ‘Purple’…are they serious?
Viking jerseys should automatically come with another team sewed on the inside so their fans don’t have to switch shirts.
What kind of sports fans are you people? Here’s the rule – you have YOUR team, maybe one or two teams that you kinda like if they’re not playing your boys, a handful of teams that you couldn’t care less about, and then you HATE the rest. You can always find a reason to bear grudges if you follow a team for long enough.
Example: I’m a Broncos fan. I hate the Raiders and Chiefs. Divisional rivals, that’s a slam dunk. I like it when the Chargers lose, but I don’t hate them, because I lived in San Diego for five years as a youngin’ and got a lot of pro-Bolts brainwashing.
Also, I hate New England because they’re the Yankees of the NFL. I hate the Jags for beating us that one year where we went 15-1 (or maybe it was 14-2, but still). I hate the Stillers for their obnoxious fans (and for Hines Ward, the dirtiest player no one else seems to realize is dirty. We’re talking Bill Romanowski, Rodney Harrison type dirty). I hate the Browns and the Bengals because, when I lived in Columbus, they’d show 2-12 Cleveland vs 3-11 Arizona rather than 10-3 Denver vs 9-4 KC, just because Cleveland was up the road. I hate the Ravens because they embarrassed us in a Monday Night game a few years ago, where some jackass ran a missed FG back 108 yards (although my hate will be tempered if my boy Troy Smith continues to do well for them.) The Jets, Bills, and Dolphins for being such lousy competition to New England. And I’m sure I’m missing a few.
NFC way, there’s a lot less opportunity for hatred, but I hate the 49ers, Cowboys, Packers, and Giants for being good during the 90s (and even more for having a little bit of a resurgence lately, except for SF). I hate the Falcons for thinking they could even dare to challenge us in the late 90s, I hate the Rams because of Kurt Warner’s Jesus Freak spiel, the Bears and Redskins for having Steeler-level obnoxiousness in their fans, and the entire NFC South for playing the most annoying football ever.
THAT’S how a true fan views their sport. Us against everyfuckingone else
New York Mets
New York Yankees
Notre Dame Fighting Irish
L.A. Lakers
I’m not from a region notorious for hating these teams or a fan of a team that are rivals of these teams, so that’s not my beef with them. I think my problem with these teams is I just hear way too fucking much about them, far more than they deserve. If you watch SportsCenter or any sports-specific highlight show on the day any of these teams play, it is guaranteed they will spend at least 10 minutes verbally fellating these teams and their players, despite mediocre or downright shitty performance or complete irrelevance to life in general.
I have my hated sports teams ranked:
Denver Broncos - I’m sure Denver is a very nice city, but I would never consider moving there because of my hatred of this team. Smug Shanahan and his equally smug punk-a$$ QB Cutler are beyond loathsome. How could anyone cheer for these idiots??!!!
Miami Dolphins - Have always hated them, but this year with all the old geezers whining and crying about the Patriots undefeated season it has driven me over the edge.
Oakland Raiders - This one is hard wired into me as I am a life long KC Chiefs fan.
NY Yankees - It’s either love 'em or hate em…I’m firmly in the Hate Em camp.
The Redskin’s perennial suckitude makes me point and laugh. Dan Snyder was a godsend.
I loath the Eagles, although Donavan’s a pretty good guy and there are Philadelphia dopers (some) I like. Aw screw it… the Eagle totally drive a suckbus too… plus it’s the short one.
Texas A&M Aggies should have got the NCAA death penalty for cheating when SMU did. That their fans can’t take a step back, look at themselves and say “Damn but we’re all acting like a bunch of inbred, ignorant tools” just makes it all the worse.
Sout’sider?
I hate the Big Ten conference. I guess it stems from 1997 when Nebraska had to share the title with Michigan, even though Michigan hid in the Rose Bowl.
Anyone who watched the Orange and Rose Bowl knew which team would win. Take two unbeaten teams. One beats #3 by 42-17. Another beats #9 by 6 points.
This year was a great year to hate the Big 10.
Michigan lost to Appalachian State and Oregon (the latter quite badly). I’m sure it was just a coincidence that Michigan proceeded to easily go 6-2 in the Big Ten.
Ohio State cruises through that same conference and backs their way into the title game. Then show they’ve learned nothing from last year’s game against the SEC champ. OSU claimed they were “disrespected” by the media before the game. Huh, turns out they were right.
Ever since the Big Ten joined the Alliance/BCS, no Big Ten team has won the national title (not counting that late-called “pass interference” vs Miami).
I’ve found that the most obnoxious Yankees fans love it when you hate their team. You want to spew vitriol at the Yankees, that’s just great, because it’s still about the Yankees. In their minds, the hatred of the outsider is further proof of Yankee awesomeness, and you’re just pissed because your team isn’t a bunch of ringers. “They hate us for our success. Nyah-nyah-nyah.”
The best way to respond to the Yankees is therefore indifference. The Yankee fan wears your hate like a badge of honor, but cannot comprehend your polite shrug.
OK, I still hate them.
The University of Texas Longhorns…If your a Texas A&M Aggie there is no hatred that runs deeper, to be honest I wouldn’t pull for the “horns” if they were playing nazi germany.
I go to Georgia Tech, and while I despise the University of Georgia, I have some amount of respect for their sports teams.
On the other hand, I absolutely loathe Notre Dame, for one reason if nothing else. At my first football game as a student, I had to put up with the whiny jerkbags wearing green and gold and talking about Brady Quinn as if he were the second coming of Christ. What’s more, a large group of them tried to take seats (seats that belonged to other people in a sold out game!) in the student section, claiming “We were here first!” It’s just too bad that security didn’t follow their line of reasoning.
They are, this November 28, 2:30 on ABC.
My sentiments exactly. I am tempted to go to a Leafs/Capitals game (since I live near DC now), and wear my Canadiens jersey and hold up a big “Leafs suck” poster. I’m a very nice person, really… but I hate the Leafs.
When playoffs roll around, I cheer for any Canadian team left, unless Toronto is all that’s left (which, let’s be honest, doesn’t really happen), in which case I’d root for the team with the most Canadian players on it, or for a team that comes from a city that actually gets snow sometimes.
I also hate all North Carolina college sports teams, because my boyfriend told me to. Duke sucks!
It’s getting harder every year (seriously. This season damned near killed me). But on the other hand, I only ask two things of my boys. 1) Beat the Raiders. 2) Beat the Chiefs. They did a pretty damned good job of it this year, so I’ll give them another chance.
I didn’t mention this because my hate for the Raiders blinded me, but man oh man, if the Baltimore Ravens suddenly disappeared off the face of the earth tomorrow, I wouldn’t be sorry. I don’t even hate the Chiefs and the Chargers as much as I hate the Ravens. I’m not sure why, but they make me irrationally angry. And the fact that Shannon Sharpe went there and got another championship ring just makes it worse.
As a Redskins fan, I must hate the Cowboys.
As an Orioles fan, I must hate the Yankees.
As a Maryland fan and Alumna, I must hate dook and all of the little dookies with the fire of a thousand suns. (Plus, by association, Dick Vitale can die a painful, slow death.)