I think a big problem with some atheists, though certainly not all, is the perception of arrogance. That people who have religious beliefs are stupid or delusional. I myself am agnostic bordering on atheism, but having gone through a kidney transplant in high school, and meeting many other families that were not so lucky as mine, I can fully understand the need for religous belief. If you experience a tragedy, like if your child dies, or is the victim of some brutal crime or circumstance, and causes your life to pretty much become a living hell, is it stupid to believe there was a reason behind it? That there is some sense behind all the senselessness? I don't think there is a God, but I wish there was one, or at least something, and I can't blame the people who actually think there is.