Why 'should' atheists be moral?

[Chad32]

Only in the short term. Unless you already have enough power to be confident in doing it repeatedly.

On the other hand, I was robbed recently by people that I let stay in my house. There's not really anything I can do, since I let her in, aside from hunting them down and beating them half to death.

But in the long run, she's going to be trusted less and less, and remain homeless and unloved. Drifting from place to place, talking about how everyone hates her for "no good reason", and wondering why the people who have custody over her kid keep blocking her from having shared or full custody.