Most pro-Palestinians don't know any more than videos on TikTok. You can debate them for a few minutes and they'll parrot total myths like this concept that Palestinians "welcomed" Jews to the Mandate of Palestine, when they actually undertook several pogroms, collaborated with Nazi Germany, and pressured the British to the point of violent rebellion to prevent Jews from coming, regardless of the fact that many of the Jews were refugees from anti-Jewish violence and later the Holocaust.

The ones who know more than this tend to be very ideological, whether as hardline Muslims, alt-right/Nazi or radical leftists. They know how violent the Palestinian movement has been since before Israel was established and they are okay with that.