A Jew is a member of G-d’s Covenant from Mount Sinai.
We don’t have a single culture. Jews around the world often live more like their neighbors than like Jews elsewhere.
We have a religion, but that’s not the entirety of being Jewish. Some Jews are not religious — or say that they’re not.
Some of our rituals are not from the Covenant. We’ve developed some customs and adapted some.
We are a traditional peoplehood but of several tribes and clans. However, this peoplehood is formed by the Covenant.
No Covenant, no Jews. No Jews no Covenant.