He is a fan of Fahrenheit 9/11. He feels a 'kinship' with Michael Moore. That's radical and Gibson has some issues he needs to resolve with himself.
That may be true (I'm still waiting for more tangible prrof than "I heard" it) but he still is a cultural conservative. Isn't it funny how some people can keep you guessing ...
"Kinship" may mean that he also is a non-traditional director, taking on non-traditional projects, and that his most recent film did well because of non-standard promotion.
That said, I don't know. Let's chill and wait for the facts before assaulting him.