How would you know they are Muslim?
Struggle didn't say they were Muslims, the term was 'Middle Eastern'. Lets see--not many Amish fit that description, could have been a bunch of heavily accented Baptists tho, huh? Or maybe some Catholic Saudis--yeah, there are lots of those!
Personally, I would have asked them outright, but since Islam is the Cult of Liars why bother? I- and I stress 'I', not Struggle, would say they were death-cultists. You can assume they were Middle Eastern Mennonites if it makes you feel better.
I see you're in Singapore.
Lots of trouble with militant Baptists in those parts?