There needs to be serious thought given to the establishment of a truly effective policy for bringing about a permanent end to this madness. These suicidal maniacs must be eliminated from the civilized world asap. Some are advocating the complete, worldwide destruction of Islam in all of its manifestations. Would anything short of that be effective? I wonder.
No muslim immigration. Sharia preaching mullahs prosecuted for sedition. All muslims given extra scrutiny and monitoring. In Europe where there's no first amendment declare Islam an enemy of the constitution and ban it outright, same policy Germany has for neonazis.
Problem solved.