Back in the 80's my Dad (a LEO at the time) would talk to anyone that would want to listen that "middle easterners" were going to be a big problem in the United States. He would tell how they would constantly break our laws and get cross with him when he would arrest them implying our laws were secondary to theirs (Islam); he would of course arrest them none the less.
Point being, to the front line, the LEO's in those cities, it was no surprise. To the rest of the country it took not one but a couple hits on the World Trade Center (and if you followed the John Doe #2; OKC; and probably more) and yet still we have countless in THIS country that plant the "coexist" bumper stickers on their cars (I see them everyday not 40 miles from where flight 93 went down).
The ones that do not wish to see the enemy of our freedom are also the ones that we cannot rely on when it comes time to fight for our freedoms. They are in essence, the cannon fodder of our enemy and we should be prepared to treat them as such as they will surely side with the enemy first thinking us the enemy of their "coexistence".