Hello, i am a real Christian

[Paul the Human]

What you are saying is not true. Atheists, in my experience, are generally quite concerned about the welfare of their fellow man. The difference is that religion is organized and atheists are not. There are very few charitable organizations that are definable as 'atheist' compared to multitudes of them organized by a church. As individuals, atheists can be just as, if not more, charitable than Christians, but you don't see large gatherings of atheists, because... well... atheism is not a religion.