He is polarizing and verbally brutish, but I wouldn't say he's incoherent. He speaking ability, which some would call a "rant," is unparalled in the world of talk radio. When I get sick of listening to him or he comes across too angry or disrespectful, I just shut it off. But his values are conservative values, and his "borders, language, culture" message is spot on.
He's also honest. He has integrity, and doesn't pander to people he hopes will respond to pandering by liking him/his show. A lot of people who don't like him, don't appreciate what's good about him. It's kind of like people who, after visiting NYC, say "I didn't like it!" You wonder "Hmmmmm."