I hate the thought of it, and know logically that it is wrong, but people (voters) are still very frightened at the thought of another terrorist attack. All Americans have given up at least a few small personal freedoms, and are more apt to be scrutinized by the authorities than ever before. I am sorry that innocent people have been discriminated against, even harrassed, but they still have more freedom here than in many countries.
Look what happened during WWII. Japanese people, even some Americans of Japanese descent were rounded up and imprisoned. It was an awful thing, but again, people were scared, so the government did what they could until they could figure out just what to do.
I am IN NO WAY suggesting that everyone with an Arabic sounding name should be imprisoned, harrassed, discriminated against, or harmed in any way, but it is a no win situation for the powers that be. If no one else ever turns out to be a terrorist, we have treated them horribly and Americans are just mean, arrogant jerks. If they do, an the government stood by and didn't watch closely enough to prevent another attack.
Just today the FBI uncovered a plot to blow up the Holland tunnel, and arrested a man in Beruit, who says he was under orders from Osama Bin Laden.
Once again, I truly hate it for the people of Arab descent that are suffering because a few people are intent on harming Americans, but I would rather be safe than sorry. Just my