I know what I'm talking about, but I get furious over Westerners trying to find indulgence for their own ancestors' actions at the expense of Middle-Eastern native Christians, and I see saying that Crusaders were somehow worse than any Muslim conquest as part of that.

Being furious I may sometimes say something imprecise.

Doesn't negate the fact that Islam is not native to any place outside of the Arabian peninsula, and those areas it has invaded still have native populations and religions not yet completely exterminated, and those are largely Christian. Saying that Crusaders were the baddies, but the Muslims whom they were fighting were not, is disgusting in that context. It's like that "Irish were like slaves too", putting things into American context so that you'd understand better.

Same as that myth of Salah ad-Din being benevolent and honorable, mostly started by German Empire's propaganda as part of their relations with genocidal Ottoman Empire.