I have seen no end of Muslims, almost exclusively Sunni, online and in real life, celebrating the fall of the Syrian Arab Republic. Even where I live, there are Syrians celebrating it. I don't know if it's just sectarianism, brainwashing, or ignorance, or some combination of it, but almost all of them I have seen are celebrating this.
Be it in comment sections, social media posts, cheering in the streets of European cities, etc. How have so many of these people consistently sided with Gaza from the start, but celebrate an Israeli backed terrorist takeover of Syria?
The reaction to stories from Al Jazeera revealing the reality in Palestine were unanimously celebrated by these same people as standing up for the truth, meanwhile, when the same Al Jazeera peddles anti-Syrian propaganda, they are happy to welcome it as equally good news.
I don't want to lose faith in the Muslims and Arabs of the world, but if they're so mixed up in sectarianism and willing to lap up the propaganda in support of a Jihadist regime, I can't see how we'll ever know peace or stability in the Middle east.
Almost all of those groups (sans Palestinians) are under repressive regimes that they too would want to depose. It sounds like your just confused that most of Arabic world aren't historical materialists.