Ridiculous anti-Palestinian chain e-mails: how to debunk veracity quickly?

Every time things heat up in the Middle East, I get increasing numbers of chain e-mails from freaked-out Jewish friends claiming all sorts of ridiculous things about anti-Jewish conspiracies of various sorts. I don’t have a problem with legitimate opposition to pro-Palestinian politics, as long as it’s based in fact. The last e-mail, though, basically alleged that Caribou Coffee was a front for Palestinian expansionism.

The friend who forwarded it to me is well-intentioned, but politically a bit naive, so I’d like to be able to point her toward a source which shows where this stuff comes from (beyond the person who forwarded it her, of course). Anyone have a favorite hoax-checking Web site? Other suggestions welcomed, too.

For general debunking, snopes.com. I haven’t been there in a while, so I don’t know if they have a bunch of anti-Palestinian stuff, but that’s the first place to check on most internet rumors.