For Atheists (or anyone who wants to answer NICELY)?

I'm only 15 and I don't believe in God because I have to see something in order to believe it. I used to believe, but I started thinking and my prayers went unanswered and I reached the age of reason when I was convinced there was no God, and if there is a God he's not the one in the Bible and he is obviously not perfect. Perfection itself is non-existent because in everyone's eyes perfect is different. I also just hate religion itself, 11 million people were killed during the holocaust because of religion, thats horrible and I really don't want to be a part of that, at ALL. And most if not all people who believe in God only do it out of fear, not love.