Watch the young Arabs watching girls (I always enjoy watching boys watching girls, but this is different). The way Arabs look at young women is a very different thing. No wholesome American leer, no longing appreciation, but a nasty hostility mixed in with a very weird kind of angry lust. Check their eyes. Boy, did this used to bother me at the head of the classroom! Younger then, I was acquainted with perusal, but the Arabs gave me the willies.
With a little experience, you'll be able to pick out the Muslims vs. the Hindus. Hindus do not have this anger and nastiness. Talk about your profiling, a sensitive woman might be of use in an airport...
Do not allow your daughters to date these men.