My history teachers focused a lot on the crimes of the Nazis and their rise to power, and after WW2, pretty much only the Cold War, German East-West divide and reunification were covered. Israel wasn’t really much of a topic. We learned that there was conflict and violence between the Jews who went there and the people who already lived there, but that’s about it.

Just one friend of mine learned more about the conflicts and came to the conclusion that Israel is quite fucked up.

I think that the majority of people know very little about what happened, and the “we need to support Israel to make things right” sentiment was an easy gesture of good will from politicians that seemed like common sense and was engrained in the political establishment over the decades (encouraged by the US). Only now this is becoming more controversial. But I think most people still have the position “this is all complicated and it’s too removed for me, idk, terrorism and bombings from both sides are bad.”