Leave it to BM to not even be able to provide an argument for why the tragedy he's using to justify his claims even existed or was equivalent, as well.
Including yourself.

Within the first few paragraph it even reads:
The Crusades lasted almost 200 years, from 1095 to 1291. The initial spark came from Pope Urban II, who urged Christians to recapture the Holy Land (and especially the Holy Sepulchre in Jerusalem) from Muslim rule.
Just like the video I showed, the islamic takeover was far, far, far greater and longer. The Crusades tried to take back some of what had been conquered and brutalized. No, it wasn't pretty - war is hell. Is it the "moral equivalent"? Not remotely.
You're jumping from takeover to brutalization with no evidence. Do me a favor and find evidence of brutalization under Muslim rule, especially any that's worse than what the Crusaders inflicted. Because you haven't demonstrated any capacity for doing such, cite sources,
but present arguments in your own words drawing from those sources. I don't think you can. I don't think you've ever been able to construct your own argument for something. You approach not from trying to understand but from trying to work it into your inner explanation for how the world works. Conclusions come after investigating the evidence, not before.
You're basically arguing equivalence from a perspective that because colors changed on a map in each case, everything's equivalent between the color changes and the only way of telling which color change is worse is which changed the color for longer. Also it seems like you're starting an unfair comparison here and hiding it in your assumptions.
Why is Eastern Rome implicitly a legitimate owner of
Palestine? Last I checked, the Romans did actually brutally subjugate that area. Masada didn't gain relevance for nothing, after all, and when we call them the Jewish-Roman Wars, we have to number the Great Revolt, Kitos War and Bar Kokhba's Revolt. Can you provide evidence of similar long-running discontent between ruler and ruled under Muslim rule? The world didn't spring into existence at any point during Mohamed's lifespan.
As currently expressed, your idea of this provides no means of showing any government or state as being legitimate because you consider any territorial gain to be conquering and brutalization, a leap of propaganda even the people trying to start the Crusades for naked political gain didn't attempt. You really need to try harder than this.
There is a much more important and larger point being missed here: Divine Command Theory (the technical term for "God says what's right") is empty. It cannot and does not ground any system of morality, for the following reasons:
It almost seems unfair that you actually have some knowledge of philosophy.