And what would you propose? We nuke the middle east?
I have an honest solution, which many will not agree with. The only way to stop these people is to change their beliefs. These wackos believe in hate and murder under the Koran, and the only thing that can change that is having them turn to the one true God, Jesus Christ...So my answer is missionaries and prayer...there is only so much mortal man can do, I would rather turn to God and ask his help.
Also on a side not, I like marines, they make me feel safer....

... not exactly in public buildings though