American atheist Jews, I want to hear from you!

[RabbiO]

Can someone be Jewish and atheist? Wouldn’t the atheist cancel out the Jewish?

No. 

Your posts so far indicate that you know virtually nothing about Judaism and/or Jews. Here, for example, you make a midtaken assumption that Judaism is simply a religion and that a Jew is simply someone who adheres to that religion.

That you are ignorant of Judaism is, of course, not a crime. And the tools to solve that ignorance are available to you. If you want I can point you to Orthodox, Reconstructionist, Conservative, Reform and nondenominstional sources.