Why I think it's a weakness of the human mind:
It's easier to get on when you're sad if you believe your (good) actions will redeem you, or someone up there will compensate you for your goodness. It's easier when you think people dies when god says so , or that bad people would be punished somewhere sometime. I honestly don't think this would happen. No one would compensate me for my deeds, in exception of creating a good ambient for those who surround to me (wich is enough compensation for me). I was raised catholic, and now, being an atheist, I think I am more respectful to other people than before.
I think its a weakness because it's fact that masses of religious people are more easily moved towards an interested position (this is an spanglish phrase... sorry). Here in spain, priests move people towards right winged ideas pretty often in their speeches (in fact, the terrorism we have here, the vasque problem and the terrorist band ETA is relationed with church, with vasque church, whose interests are well konwn). And, in fact, in this country, many religious people is clearly racist (not more than than in america tough, in wich I have seen by myself that whites don't shake hands with blacks in church, and neither of them shake hands with latin-american people) . Here, non-religious people tend to be more tolerant (I have met pretty open minded nun's though) So well, religion is in my opinion so corrupted (by humans) I won't believe in nothing but science. I just hate how many countries use religion to convince it's inhabitants to go to war. I suppose muslims would agree with me, because when they where in al-andalus (spain 7 hundred years ago), they where tolerant (there where chiristians and jews in spain apart from them) and they supported arts & science more than any other culture. In fact, christians where brutal in comparison (One popular phrase that years was "The only difference between a noble christian and a muslim is you can smell the christian one before he reaches you" xD). So, those who claim to kill infidels are only corrupting that what says in the holy scriptures. I think many of the muslim leaders use koran to force people to do things I honestly don't believe the koran says (I have read a little, a free translation of the koran... and I don't see nothing about going to war or kill people).
The same case for america... "God save america"... LOL.... If there's a god he or she will "save" worthy american people... not america as a whole, that's for sure...(as there are many that deserve hell for genocides, as in avery country of course) as he will do with the rest of the people (and hey, if I am worthy, he would save me even if I don't believe in him, because he is fair, and knows that actions are more effective than praying ¿aren't they?)
When you can't exaplin everything, god will, so It's easier to live. It's more much easy to think that you are actually someone, not only a buch of protons and electrons recombined. But, even in this case we'll be immortal too, as our particles will create other things, they would not be destroyed, because I said before, life is only a definition. When I die, nature will re-absorb me, and my body will serve to continue the cycle of the so called "life".
My point is, people who calls himself a real crhistian or muslim or jew or whatever, only needes his conviction, not church. And, well, I think there are so few truly faithfull people... as the majority of those so called religious are religious only to pray god to forgive his sins and justify ther actions...
This pure conviction is not greater than mine or any other atheist who has is own moral code.
One problem comes know. True christians or true musilms don't say anything when religion is used and perverted to achieve thing (or at least I don't see them... my friends said "this is not good", but won't move a finger against it). They let them do it. Atheists won't. If I was crhistian, muslim or jew, and I really LOVE my religion, I would be horrified of what my country does in the name of the "true god", and I would try to fight that instead of looking another way.