I think that the main thing that gets atheists' backs up is the sheer certainty expressed by religions, in their prayers, hymns, teachings and in what they peddle to children. I get vilified for my alleged evangelical atheism, yet I have not once expressed certainty about my stance and have said plenty of times that I disown "atheists" who express certainty. They are very foolish to do that. I don't know whether there's a God or not (though I'm a long way towards one end of the scale). I'm more than happy to declare that I think anyone on either side who expresses certainty about God's existence or non-existence is a fool. The unfortunate thing for the planet is that those on the existence side who set aside their uncertainties, if they have them, when they preach their creed to others, especially to children, do a huge amount of damage.