While tolerance for others is a must, it is a two way street and in case of security, PC has gotten the better of us.
Using the race card, while convenient, is also wrong. If the Imans were preaching like MLK that would be one thing, but sadly they are inciting violence by spouting rhetoric like Farrakhan.
Civilized countries, such as England has seen the need to arrest or expel hatepreachers. Holland saw a muslim kill an innocent artist, Denmark saw their embassy burned and Imans called for a jihad against that nation because of a cartoon. Is that the face of a civilized, peaceful religion?
Yes, the christians had the crusades, but the ottoman empire wasn't the nicest either, of course mind you, this was back in the dark ages. The difference is that we are no longer in the dark ages, yet some people apparently has not noticed this.
The behaviour that we condone in the US, while the vast majority innocent is also a far cry from what would be allowed in a muslim country. Want to bring in a magazine such as FHM into Saudi, have your woman in a bikini or drink a beer, well not going to happen and while we westerners don't understand it, we generally abide by the rules and understand that such is the lay of the land. The muslims then, must also understand, that while we are much more tolerant, that certain things, while allowed, can subject one to closer scrutiny. They need to abide by common sense and common sense dictates, that a group of muslims praying in a terminal or on an airplane can be cause for concern.