I think there have been enough nut bars blow themselves up or have suicide by cop that we can now set in place the consequences. The dead nut bar does not care; they are with the virgins as martyrs of the faith (not sure what happens to a female).  Anyway one thing I learned when I worked in the Arab world; taking responsibility for your actions is non existent. Killing one self has dramatic ripples on many lives and I suggest the consequences got to go strait into the family and friends circle. These people parents come from Muslim country, send them all back, destroy their passports, the family, the friends everybody on there contact list and confiscate all there money for the victims fund. These actions will need to be highly published so everybody is aware , that blowing oneself up and rippling this terror on people will have consequences, and since a nut bar can not accept the responsibly there family and friends will.