What makes you think it's only the Christians doing work with the homeless, the poor and the sick etc? Bill Gates seems to be doing a whole lot, and he's an atheist.

The world would be better without religions because to do good requires only compassion; to do evil and call it good requires religion.

The bad things include preventing loving couples from marrying because they don't have different genitalia. Harrassing non-Christian military into nervous breakdowns and fragging atheist soldiers like Tillman (was that his name? I confuse him with Emmett Till). Flying airplanes into buildings and killing girls who want an education. Oh, right, that isn't the Christians, but boy, it's hard to tell the fundies apart, especially since they all worship the same invisible friend.