He is frank and only pretends to be respectful. I like him because he tells it how it is in his mind and even if he might be wrong he makes you consider the ideas while you are laughing. He is no vulgar but that doesn't mean that people won't feel offended. I don't care, because in an ideal world we should be able to speak our mind without fear of nothing, because we as he should be that brave and opinionated.
Checking his little filmography i see he has a bit part in that great comedy, The Jerk (Carl Reiner, 1979) with Steve Martin.
I think this next video is a good introduction to him, in case you don't know him, or just a few minutes of humor without useless courtesy for nothing "You understand what i'm saying?"
Fellow guelylanders: Jackie Mason!