I have had an opportunity to see the other side of racial profiling. My grown son looks somewhat "Middle Eastern". He is part Hawaiian and has a heavy beard. When he travels alone he frequently is pulled aside for the full treatment, (pat downs, shoe removal, etc.). When he travels with me this doesn't happen. A person in his Bible study group told him that he "looks like a terrorist".
That said, I would have been at least observant on this flight, but even supposing something had happened, it sounds like one of the greatest problems to deal with would have been all the people having panic attacks.
Why did these Syrians bring their cell phones and cameras with them into the bathroom to perform WuDu? Is that a Muslim ritual, too?
The ambiance of airliner potties is such that it's a wonder more don't dine in them.