I haven't read much Hitchens and none in years, so I don't know what he says. I agree with Dawkins that God is a delusion, although I have not read his book. Being delusional doesn't mean a person is crazy.

I only recently found out who Sam Harris is and haven't read his books.

I tried to read Daniel Dennett and I'm sure he's brilliant, but I go turned off in chapter one of his "Consciousness Explained," so I don't know what he says either.

Of these 4 horsemen, I know very little. I hear about how they are very extreme in their views. Maybe they are - but to the extent I have read and heard their actual words, I haven't found a lot to disagree with. (Except the 1st chapter of Dennett, which was just dumb.)