Good deeds are good deeds, and atrocities are atrocities. Religion is not behind them, no matter what a person says.

A good person can be any religion, an atheist, a jew, a christian, muslim, anything. Behaviour is not exclusive to a person.

Religion is open to interpretation. An immoral person may interpret religion in order to explain his own actions, but that is only an excuse. Conversely a good person may use religion as a reason to do good things, but at the basic level that person really did a good deed because they are a good person.

I don't believe religion is behind the biggest atrocities of the world, or most destruction. I have issues with organized religion however, and the ignorance that often accompanies it. This is not an absolute.