The only reason atheists have morality is, they were trained by people who were trained by people who were trained by people... way back to a time when the morals of the various religions, especially Christianity, ruled... and when there was very little if any atheism.

If there was no morality of Christianity and other religions, atheist morality would only exist as any individual atheist agreed on within himself. This could range from essentially no morality, to a morality stricter than the most strict formal religions of today. Such religious activity on the part of atheists would make atheism the most erratic religion of all.

As it is, the morality of atheism is inbred, automatic training coming mostly from Christianity.