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Actually, several suicide attacks in Israel have been performed by arabs disguised as hassidic jews and anglos.

Appearances are easily changed and aliases can be used, so using appearance and names as a PRIMARY means of catching potential terrorists is completely ineffective.

The 9/11 terrorist didn't need to disguise themselves since there was nothing about being arab that would have set them apart from the thousands of other arabs flying planes that day.

The fact that many of them attended flight schools for strangely limited training and/or were known terrorists is the reason why many of them were being investigated by the FBI and the CIA long before 9/11.

If you think the reason why the feds were watching many of them was because they had arab names and appearances than you are quite clueless how legitimate criminal investigations work.

Timothy McVeigh was a pretty nasty terrorist and there are many other people out there like him. I want security personel looking at suspicious people as potential terrorists, not just people with certain racial characteristics.