The same thing has been happening in Israel for years. Find out who sent this suicide bomber, who paid for his bomb, who paid his family and send a missile into his living room and destroy his entire family. If it is Iran, do it, if it is Saudi Arabia, do it, if it is Germany, do it.
We are in complete agreement. This eliminates the problem of "innocent civilian" casualties and pinpoints the evil doers and their handlers/enablers. It does not necessarily root out those who are forced by virtue of kidnapping or intimidation of some kind, although I would say there needs to be some kind of solution for that one as well.