I disagree. There are many American citizens and legal vistors who are from arabic descent.

Yep. And those people are also getting their rights shafted thanks to 9/11. One of my good friends at work came from the middle east long ago, and has lived here for years. He is a legal alien, but yet got harassed by the FBI thanks to his neighbor calling him in. The reason? "He looks to be of Middle-Eastern decent".