but this is not an incorrect use of “racism”.

Israeli Citizenship is determined solely by religion. The only reason that a Palestinian can't be an Israeli citizen is they haven't converted to Judaism. That's religious discrimination.

https://en.m.wikipedia.org/wiki/Israeli_citizenship_law#:~:text=Every%20Jew%20has%20the%20unrestricted,one%20parent%20is%20a%20citizen.

Otherwise you'd also have to classify the Protestant vs Catholic wars in Europe as racist too.

I agree that's part of the culture but it comes down to religion. If you are of Jewish faith, you have automatic citizenship in Israel.

When Ethiopia had its famine in the early 90's, the Ethiopian Jews, who were Black and culturally Ethiopian, https://en.m.wikipedia.org/wiki/Operation_Solomon#/media/File%3AFlickr_-_Government_Press_Office_(GPO)_-_LINE_OF_ETHIOPIAN_IMMIGRANTS_STREAMING_OUT_OF_THE_HERCULES.jpg were evacuated to Israel simply because of their Jewish faith. Race had nothing to do with their becoming Israel citizens.

Biologically speaking, there is only one human race

The colloquial term for a group with common physical features is race. That biologists have a different technical meaning isn't relevant. If you deny that people categorize others and call it "race" then you deny racism.

Racial:

"relating to the major groupings into which humankind is sometimes divided on the basis of physical characteristics or shared ancestry."

I’d argue its meaning had transcended its original linguistic root.

But this is religious discrimination. I've already shown that neither ethnic group nor racial group matters in this situation.