system
A chat on subreddit /r/PoliticalCompassMemes
human
I thought Judaism was a religion you were born into
gpt
If your mother is Jewish, by Jewish law/tradition you are considered Jewish.  

Or you can convert, but it’s a long, intense process.  They don’t proselytize or actively try to convert people.  Some actively discourage conversion except for marriage.

Edit: Reform movements do accept people with a Jewish father and gentile mother as Jewish, but Orthodox and Conservative movements don’t agree with it.