This is a nice idea, I love to talk about topics like these (:

Religion in itself is not evil, it can't be.
People can use it for evil purposes, as christians did during the medieval age. They used it to suppress the poor and the weak, to become richer and richer.
But in general I think religion is a good thing. I define religion as a system of moralitiy, with which people try to find a way to lead a good life for themselves and for others. Their belief can give people strength and courage to do things that are hard, but right (like standing up for someone who gets bullied).

I say all this as a non-religious person (if you don't count a philosophy of life, like veganism for example) .