I absolutely agree! If these people were genuinely convinced that there is no God and we are mere accidents from chaos, then they shouldn't care less what other people choose to believe or not believe. After all, if there is nothing but nothingness behind anything, it makes no difference what anyone believes or denies - it doesn't matter! What I find interesting about Hitchens and Dawkins, I don't know about the other guy, is that they came from religious families. They had a start in at least a semblance of a belief in God but, for whatever reason, they rejected that belief. What I suspect is behind this "militancy" is, as you said, a blind emotional desire to rationalize away the idea of God and all that having a God above us all demands of us. They want to deny any accountability for whatever they desire to do with their lives and especially any consequences. Like Hitchens does now, they will find out that they are mortally wrong and it will be too late to avoid the eternal consequences.
Yes, and I also think, if they were genuinely convinced, then they would act like sociopaths, doing whatever they please, as long as they thought they could get away with it. After all, if there is no God, then morality is not sensible, and selfishness and hedonism would be the most logical ideals to subscribe to.