Miracles and Anti-supernaturalism

[Godscreated]

If there is no God, the only reason to help people is if the action --in some way, at some point-- serves me. How is that moral?

But aren't you only doing good to show your god how devoted you are and how much you love him?

In other words, you do good only because it does serve you.

This is where you seem to go off track with Christians, we do not do it for ourselves, we do things for others because they are in need and thus it's a witness for God. It shows how He's at work in our lives, we help others with selflessness, we expect nothing in return.... hopefully most of the time we're human after all. We are to imitate Christ's walk on earth, serving others selflessly.