Well surprise, surprise. It turns out that my immediate suspicions were correct. The men "from the former Yugoslavia" are in fact Muslim. And they all seem to be saying that it's all about their religion.
Of course, the usual band of idiots are all falling over themselves announcing that it ISN'T about Islam.
I'll go with the guys that were there.
[Hat Tip: LittleGreenFootballs. And no, I didn't read them before I posted today]