Let's talk about the practice of their religion...what's that look like?
To me it looks like a lot of kneeling, bowing and praying. Not my cup of tea but nothing illegal about it.
Then again they got these fringe nut cases who believe they can hasten the appearance of the caliphate and advent of worldwide islam by blowing up non believers. Kind of reminds me of how the KKK operated on their “christian identity” crusade. I don’t remember people burning down the Vatican or the Church of England over their atrocities though.