Jason I think you are missing the point... The whole point of Cohen stuff is that he is showing up stupid people/bigoted people for who they really are. Like this guy ....
Same with Ali-G, the character is based on the satire of modern commercial hip hop and in particular Tim Westwood and Puff Daddy/P Diddy. Ali-G character is dead on the middle class White Kid who desperately wants to be some sort of kick arse "Black" Gangsta.
Bruno is exactly the same ... My sister goes to the clothes show, watches "America's Next Top Model" and buys Magazines like Heat and Closer. Having read some of the bollox that is associated with that world. Bruno pulls off the satire perfectly (probably a satire on Gok Wan and the like).
+1