I’m pretty sure Democrats made hay in the Senate in 2008 by tying GOP incumbents to Dubya.
Look at the five Republican incumbents who lost. Ted Stevens was facing prison, Dole had just accused her opponent of being an atheist in an ad that backfired horribly, Coleman damn near won in a state that went to Obama by double-digits, Smith lost by three points where Obama won Oregon by 16, and Sununu lost to a former governor who was very popular.
But if you want to say that Bush brought down these incumbents, whatever.
That’s the what, not the why. Why do these numbers excite him? Some people tried to guess, thinking maybe he incorrectly thought it meant that the Democrats were posed to take on the House.
And I’d argue the “pile on” has more to do with the contemptuous tone he takes when replying to legitimate questions. It’s human nature.
Uh, cuz the Dem numbers went up? And he hoped it was a trend.
Probably, but some of the questions were a little dumb too. “Who’s this Cook guy?” Is their Google broken?
I also got a vibe of “I’m not familiar with him, so who cares?” Reminds me of the way a lot of people here regard Twitter.
A good OP would look something like this:
Note how this is barely longer than the OP, but it actually has information in it, unlike the OP’s clickbait-style post (“You won’t believe the results of this poll!”) While clickbait is admittedly popular on Facebook, I dislike threads or even individual posts that adopt that approach.
And if you think including information in your post is “spoonfeeding,” I’d like to have a talk with whoever taught you expository writing :).
I’m sure Charlie Cook would find that comparison very flattering.
LHOD, your proposed OP would indeed be a good and interesting one, albeit not one I could have written because I didn’t know that information about the poll until I read your post. And you are entitled to like what you like and prefer what you prefer. Personally I have no problem with what Cook and The Pollsters* did, which I emulated (to a less extreme extent) but YMMV.
Another way mileage varies, BTW, is that I don’t generally go into threads and complain about their creators not supplying enough information for my tastes. 
*Your comments about Facebook imply that The Posters habitually make enigmatic posts like that, as a marketing strategy or something; but if you look over their page you will see that it was actually a rarity, inspired by Cook and his awe-invoking reputation.
More good news from Cook:
Now that’s what I’m talkin about. I’m not a big fan of voter suppression at all, and I’ll never encourage people not to go vote, and I think that the more people we have who are actively involved in our nation’s electoral system the better for our society.
But if a bunch of Republicans, despite everything I believe, decide to sit this one out, I admit I’m gonna do the Snoopy dance.
The Democrat’s strategy should have been to start a conspiracy meme stating: “If you’re going to vote, they will know who you are and they will come to take your guns away!” 
I’m also talkin’ about it, but with much less of a conflicted perspective. I don’t want our voters suppressed, but theirs? Fine by me! If someone came up with a very clever way to insert **Uniqueorn’s **conspiracy theory into the brackish waters of the alt-right (without it being possible to trace it back to our side), I’d be totally down with that.