The religious are brainwashed in to this idea that morality, A sense of right and wrong, Can only be known through their religion and their god. But if you only do good things because of a fear of punishment and hope of a reward, How moral can you be? If you are bribed and coerced in to behaving a certain way how much personal credit can you take for your actions? And what would you do if you weren't bribed and coerced?
In the christian model, Morality is nothing more than fear, The controlling force of christians and children alike. The church doesn't teach compassion, It doesn't teach empathy, It teaches fear. It doesn't tell you why you should do good, Only what will happen if you don't.
I'm not saying that "morality" doesn't exist, I'm saying it isn't the result of a god and it certainly isn't the result of christian teachings. Are we to assume that before mosses came down with the ten commandments people thought it was ok to steal, murder and rape? Are we to assume that before jesus' teachings people lacked compassion? we only have to reference the story of the good Samaritan, A story jesus told, To see that people had a sense of decency and compassion long before jesus.
So if we remove the god controlling aspect of morality, If we remove the fear aspect of morality we are left with religious people doing good for the same reason as atheists. And if they wouldn't do good without the threat of punishment and the hope of a reward we are left with compassionate atheists doing good and psychopathic religious people forced into not doing bad through fear.