I'm sorry to hear that, you shouldn't be bullied because of your religion, or lack thereof. Well, I was raised a Christian, and I think faith is a great thing to have; it's certainly helped me through tough times. What you're asking is a question that every Christian grapples with, I know I have. I see death, famine, persecution, and I can't help but wonder, why would God allow such things to happen? I honestly have no idea, it's something that will be studied for years by theologians, and something I don't think we'll ever truly know. In short: I don't know. I just trust in God, and I trust my faith, and although that may sound incredibly idiotic to you, it's just part of being a Christian. God does things no one understands, sometimes he answers prayers, and sometimes he does not. It's obvious how that could be seen as pure luck, but for Christians, it's just how God works; how he intends things to happen.
I'm sorry I insulted you though, and I'm sorry for other members of my religion trying to push their beliefs onto you, especially when you clearly had bad experiences with Christianity.