Atheists: Answer me this...?

i respect people who are religious. my whole family used to be religious but now were all atheist. i see that religion can be a beautiful and comforting thing, incentive and inspiration to do wonderful nice things and a life after death. who wouldn't want that right? but here's where the problem lies: when people become too zealous and take what their holy texts say literally. my family was torn apart because my grandma saw someone eating bread on a plate that was supposed to be kosher on passover. she now curses our entire family and regrets letting her children marry non jews and will never visit us again. i guarantee you i'll never see her again because of it. she used to be the person i would come to with my problems and babysit me when my parents were gone, but never again. because of one mistake. she now says that our entire family is a failure. also, look at all the terrorism that's come from religions and the recent harold camping incident which scammed many people out of their life-savings. many religions have some sort of group that attempts to kill all that don't believe what they do. i believe religion is a great concept. but i also think people should just look at it as a concept. people first made religion as a way to explain what came before them, and what will happen after they cease to exist. its true that their isn't proof that god doesn't exist. we will never be able to disprove god, but only prove its existence, but thats beside the point. people shouldn't care if theirs a god or not. they should follow their morals and believes regardless. thats the problem with society, people need a higher power just to have incentive not to do bad things. today, prophets would be ashamed of what SOME people have done with religion, though it has done much good.