There was no "Judaism"

"Jewish" is an ethnicity--a people--not a religion.

The Truth was revealed first to the Jews, then to everyone else, by God Himself. Through the prophets, through scripture, through Jesus Christ.

Jesus was Jewish (yes) in that he was born of the Jewish people.

But something I've heard recently is "Christianity is Jewish" and that's absurd. Atheists who have negative views toward Jews say this, and actually, Jews who reject Christ say this, too (coincidence?)

This is similar to saying that America is British, or Americans are British--it isn't, and we're not.

The people (a "nation" and "people" being words you can use interchangeably) of Christ's nation are made of every tribe, tongue and people. This doesn't erase nations here on earth, but it does establish a nation that transcends all of the earthly ones.

I am a Christian of European descent.

A Christian brother in Nigeria is of African descent.

We are not the same people (different ethnicity, different language, different culture, different many things), but we are both united in the fact that we both belong to Christ's church.

Jews (a people) killed Christ.

Jews who turned to Christ are, in their identity, Christians first, but still Jews (ethnic).

"Judaism" is a modern religion that explicitly rejects Christ and attempts to maintain the traditions of the Jewish people of history. This didn't exist in the Old Testmanet. There were Jewish people who knew God and those who didn't. There were non-Jewish people who knew God, and those who didn't. There was no Jewish "religion" in the sense that there is now. "Judaism" is something we crafted up after Christ, and many in the West consider it a "valid" religion that is a sort of forefather of Christianity. This is not how it works. Judaism today actually carries the spirit of the very people who killed Christ. It's truly anti-Christian. More than any other religion, actually.

Question: did the British kill the British in the Revolutionary war? Or did they kill Americans? Similarly, did the Jews kill a Jew when they killed Christ, or did they kill something else?

Reader, please think this through. "But Jesus was a Jew" is not going to survive much longer...