Hey, sorry, I didn't mean to be racist in my last post -- I was only throwing out a theory of how the U.S.'s collective unconciousness might be reacting to Borat.
But stereotyping? Absolutely. Comedy is BUILT on stereotypes. I took a sitcom writing course while in USC film school. The gist of the course is that all sitcoms (Comedies) are built on stereotype. The list goes on and on. From "Friends" (Phoebe=flake, Joey=Dumb swarthy type, Chandler=neurotic jewish, and the rest, "dumb blonde" etc.) to "Barney Miller" ("The Gambler" "The Curmudgeon" "Vanity" "The cheapskate" etc.) The key, according to our prof., is that all these stereotyped characters are immediately recognizable to the audience within the first few words they speak. The PC crowd may lose their nut over this, but it's COMEDY - FARCE. It ain't highbrow. It isn't politically correct. It's supposed to be FUNNY. Laughing at our failures or another's. Laughing at recognizeable stereotypes e.g. the absurdity of common human traits.
When Borat sings "Throw the Jew down the Well," you can either find it offensive or laugh at it as a send-up of racism. If you find it offensive, pity you.