I don't know the specifics of these demographics, only that Minneapolis is accused of being massively Somali (my aunt's dear mother was my first knowledge that any "do-gooder" Christian doormatting was going on there) and thus Moslem.
If it's massively Moslem, we shouldn't be surprised if Christians (or CINO) are at minimum including staff, and not causing absences. I'm OK with this in principle. Which is one of the reasons we opposed adding Moslem (and likely should have, Jewish) holidays as off-days from school - the reason had been, there simply were too many people being absent. NOT to "honor" the holiday.
But does it upset me that Moslems are getting to that point? Yes.