Where do atheists get their morality from?

[Polaris]

It is impossible for an individual living in society not to have their morality influenced by the countless millennium religious doctrine has interwoven among secular laws.

Well, as a millennium is 1000 years, religious doctrine certainly isn't countless. Christianity hasn't quite reached plural, yet. And I can count to 2.

Secular laws were interwoven among religious laws, so claiming that religious laws are interwoven amongst secular laws isn't really furthering your case any.

I can say with utter confidence that none of my morality has a religious basis. It is based on the Golden Rule, which long predates modern religion and is so intrinsically linked to the basis of our morality (reciprocity) that the period of that predating extends many thousands of years.

Religious beliefs trace back to the Paleolithic.