In England they lump arabs and asians into a single group called asians. Yeah, not real accurate grouping. It is funny that muslim arabs don't even consider asian and black muslims are real muslims and there aren't too many black and asian muslims who commit terrorist acts.
This is the Broad Strata of Society from a recent episode of jihaidism in Canada. If you look at pix from the recent public demonstrations in the UK against Danish cartoons, you will see lots of similarities.
At the very least, we can start here and expand the criteria as the intellegence services inform us based on who they catch posting jihadist-speak on internet forums.
Or we can just treat everyone as if they are the next mass murderer. Civil liberarians would love that, up until the very moment their son or wife (er, live in girl friend) gets blown up by the jihadist who was passed over so the screener could devote full attention to frisking the crippled war vet.