The fact is that I neither despise nor pity those who don't believe in God. My opinion about them is similar to what it would be of those who don't believe in gravity because they cannot see it. (See the actual force, not its effects.) Because the effects of rejecting God are both clearly delineated and observable, I simply find it a little strange that some people cannot see those effects and on that basis deny the existence of the causal factor. But that doesn't bother or upset me, it merely causes me to mentally shrug my shoulders and think, "well, good luck with that".
On the other hand, having a very small degree of orange-green color blindness, I can completely understand the bewildered feeling of an individual who simply does not see the big orange letter on the green background to which another individual is pointing, wondering what on Earth he could possibly be seeing.
The atheists with whom I do have a problem, and for whom I regularly demonstrate a great deal of contempt, are the liars, the cheats, the deceivers, and the malicious. If one genuinely believes that religion is a crutch for the weak and psychologically needed, what does it say about those who are so eager to kick that crutch out from under those who clearly need its support? And, as an armchair intellectual, I find their willful ignorance of history, religion, and philosophy to be as astonishing as it is irksome. Intelligent? I don't even consider them to be educated. To claim that religion either causes war or is an important strategic element of war is to be every bit as ignorant as the apocryphal Flat Earth proponents so often cited; the significant difference being that the Religion Causes War Society not only exists but is even willing to expound their ludicrous and historically illiterate arguments in public.