The Arab American population in Michigan is only 225k (
per census reporting) and the Muslim population is estimated to be around the same (including people who aren't of voting age). Uncommitted got 101k votes, and got at least 8% in
every single county in Michigan. It's highly unlikely that it was mostly Arabs/Muslims.
This is not a criticism of you, as I'm sure you simply read the argument somewhere, but the idea that "it's just Arabs who care about this" is just denial. Denial that used to be "
nobody cares about this except irrelevant hippies." It is denial, from people who either support the Biden administration's handling of the Gaza conflict (and don't want to accept how unpopular their position is among Democratic voters), and from people who don't support it but were not ready to defend a genuinely unpopular and poor course of action.