I’m pretty sure their religion requires certain parts of the body to be covered for Muslim women. It depends which brand of the faith they are required to follow.
Its still subjugation by gender, and not to my personal taste.
Having lived in a moderate Muslim area of Indonesia, I can say that the observation is tolerated and adapted to suit local custom.
I may be wrong about religious requirements as opposed to tribal standards, but it still doesn’t sit well, especially if it’s used to demonise some decent folk of my acquaintance.