Why 'should' atheists be moral?

[Chad32]

For the same reason anyone should be moral. Because it will lead to a better life within the community. We're a social species, and those of us that get along with the group tend to do better in life.

I would think it's the christians who are more likely to go around killing people, because their god has such a dim view of people who don't worship him.

No religion has a monopoly on morality. Certainly not the Abrahamic religions, which are much more concerned about what their god wants, than what society needs. It only takes a cursory reading of the bible to figure out that if we actually followed it, we would quickly descend into barbarism. Killing and enslaving those who don't worship the same god, pushing down every group to keep them below the white male members of the population. We have been slowly growing out of the narrow minded and violent teachings of the bible. This nation wasn't founded on the christian religion, and the more we move away from it the better this country becomes as far as equality goes.