StoneByStone
It's OK to Be White
Judaism was a tribal religion, once upon a time. For historical reasons, it was difficult for those who gave up the religion to escape the label, so that not-very- convinced 'Christians as different as Disraeli and Marx were still seen as what they had rejected. In fact, Judaism now is a religion, 'Jews' are a product of racism, like 'blacks', and Zionism is a sad survival of a wrong reaction to Nazism. Let people be what they want to be!
Judaism is still a tribal religion.
The term "Jew" comes from "Judean," which was generally what Jews called themselves throughout history. Jews were never like Christians or Muslims, who defined themselves by belief. It was always about ancestry. That's why Jews can stop practicing Judaism, and even become Atheist, and still be considered Jewish by their own people.
So it's not that Judaism is now a religion, Judaism was always the ethnic religion of the Jewish people.