Atheists tell me something?

That is a gross generalization, and it's untrue. Not every Christian is making a concerted effort to relieve world suffering, either If they were, by shear numbers alone, we would live in a paradise Eden-like world. And as you point out, we don't. Just because you claim to worship a god, does not automatically make you a great person, or even a good one. I, myself, am incapable of transforming the world, although there are several local charities, both secular and religious, that are grateful for what little help I throw their way. Yes, everybody, both believer and non-believer, could do more, but a lot of us on both sides of the issue, don't. It is unfair and untrue to label one side or the other uncharitable or more charitable than the other. RAmen.