No, not at all. Preventing our enemies from attacking us is generally a good idea. Do we do that by casting a wary eye on ALL Muslims? I would argue no.
I repeat, how in the name of hell are we going to determine which are which if we don't look at them all with a gimlet eye?
The Justice Dept. is consistantly rooting out terrorists and their supporters who had previously been considered moderate Muslims loyal to the U.S.
Al Qaeda held classes instructing their operatives how to blend into their host countries' societies without attracting attention.