Because, like, half a dozen people said something along those lines, yet he falls back on the lazy "horsefeathers you, liberal Hollywood" bogeyman. I'm not saying he's explicitly doing what was described, but it's usually the type of ranting that shows someone to be a real dimwit. I mean, it's completely self-defeating; typically it's someone who thinks "ugh, why can't celebrities shut about politics," nevermind that his forum and his statement makes him the thing he's complaining about. Fair enough.