It should be clear from my reasons for choosing to be an atheist that I have no interest in convincing other people to become atheists. I think people should choose to live in the universe which they prefer. I don't think that somebody who believes in god is wrong; they just follow a different faith. After all, many people who believe in different gods are able to live together comfortably, despite the clear contradictions between their faiths.
Of course, some religions include the belief that they know the only truth, and the further belief that they should convince everybody else to embrace that truth. That's OK as long as it stays peaceful, though personally I prefer that such people don't come by and bother me. Sometimes it turns violent, and I think that most of us can agree that that is bad for all sides.
Incidentally, I don't think that religion has caused as many wars as people sometimes claim. I think that religion is more often used as a rallying flag to convince the fighters that the desired war is just. Still, religion has undeniably caused many wars, and has made many more wars much worse. Moreover, I can easily imagine a war fought in the name of atheism, although I don't know of any actual examples (I don't count the wars started by atheistic communist countries, because atheism was not a significant reason for starting or continuing the wars).