I think that to really get some of this movie, you have to know someone(s) with attiributes like Napoleon. For example, when I saw it, I thought to myself: Holy crap! He's like a mix of 5-10 kids I went to high school with!.
Another key to getting it is if you know that area of the country. Having known people from that area of Eastern Oregon/Washington and Idaho, I'd say it's a pretty good stereotype of that area (atleast from thats what I gather from the people I know, and the few visits I've made out there - maybe not what everyone is like, but there are people out there like that).
Or maybe the haters just don't have a sense of humor. GOSH!
