[TheDingoAteMyBaby]

Now what about someone born Jewish who does not believe in God? Are they also no longer considered Jews?

[JadeEmperor]

"Now what about someone born Jewish who does not believe in God? Are they also no longer considered Jews?"

If one is born to a Jewish mother and is unobservant, they are an unobservant Jew, but still a Jew. If one openly converts to another faith, they are no longer a Jew. As simple as that.