They do!
Try corraling a nuke tipped ICBM.
It's come down to Us or them!
Yes, I know their leaders and a few million useful idiots in the crowd want to destroy us and of course they're wrong. We have infinitely more atomic weapons than they will ever have, and we can easily destroy the entire islamic world in a matter of, literally minutes. However, if we still believe in the basis of our Western civilization (Judeo-Christian), we don't need to indiscriminately "exterminate" all of them(i.e., the innocent if they can be discerned). We need to get them out of the rest of the non-islamic world and put them back where they belong; they can slit each others throats like they have for centuries. If they then desire to try and destroy us from afar, we can do them the same favor and wipe them out in their homelands. A few submarines sitting in the Arabian Sea or Indian Ocean can send forth dozens of missiles and get it over with. As long as their oil can still be had, the West will be fine. What else do they have to offer? As a matter of fact, if they didn't have oil, no one would care, because they couldn't finance this terrorism to begin with. And the sad fact that liberals in the West who seem to think all cultures and societies are relative and we can all live peacefully together, are now finding out the opposite. An ugly, historical reality.