Questions: Religion & Spirituality

I ask this question precisely because whenever I come across a preachy atheist, he (it's almost always a "he", like 98% of the time) can almost never remain calm and clear-headed enough to actually make a reasonable case for why no one should believe in God anymore, because their anger gets the better of them; they're overwhelmed by it. It's almost as though they know, at least on a subconscious level, that God really does exist, and that fact makes them angry because it means that their actions will have real, long-term consequences.