As far as I see it, its all down to people rather than beliefs. Many have killed in the name of religion, but so have they more so many other reasons. Faith in Theism has brought many people comfort, meaning and happiness as well as atheism has. Both sides have literally the same groups of people: those who want to convert and/or condescend others for their differing beliefs, and those who are just happy to believe what they want and let others do the same. No Anti - Theist vs Theist argument can ever be settled indefinitely as neither side will ever understand everything and be able to provide a argument or theory that does not have flaws.
In my view, there will always be questions that neither side can answer so its really a decision as to where you place your faith. Unless someone knows everything about everything and even then know WHY everything is the way that it is, then they have no right to condescend others for their beliefs, as there are convincing arguments on both sides. Either that if you don't want to then be agnostic.