I really don't care what anyone believes about God, as long as they believe it peacefully and do not attempt to impose their beliefs on me through coercive means. "Coercive means," for purposes of this discussion, include using Congress and the courts to subvert the First Amendment.
Atheists, however, are particularly annoying in their religious beliefs. Yes, atheism is a form of religion, as it is believed on faith -- a negative kind of faith, but faith nonetheless. To know whether God exists, one would have to be God himself. Man's comparatively minuscule intellect is insufficient to answer the question. Therefore, many of us believe, on faith, that there is a higher power and a higher purpose to our existence.
Atheists, on the other hand, insist that God does not exist, that God is a myth and religion a delusion. They are actually rather impatient, even intolerant with those who disagree. After all, the question is entirely clear to them, and they assume that their personal clarity on the issue should be shared by all. In this regard, they are no different from any fanatical sect who insists that theirs represents THE ONE TRUE RELIGION, that all other religions are doomed to fail and only they are possessed of God's grace, acceptance and enlightenment.
I recently saw a video by the atheist Pat Condell, whose anti-Islam rants I love, haughtily insist that "there is no God." He knows. His is "the one true religion."
Atheism is similar to color blindness, and atheists are like color-blind fanatics insisting that green, red, blue and yellow do not exist, and that those who see them are delusional. Atheists are entitled to their beliefs, but I wish they would stop wearing their religion on their sleeve and trying to push it off on everyone else.