1) comparing with the world wide terrorist attack against , this is very less or nothing.
2) They think muslims not followign their original religion rules (like jihad full time and work part time, spread hatred against nonmuslims, have beard with 5 time namaz, and all nonsense).
So, they just tried to show that they would be punished if they continue like this?
3) Everybody want to control the society with unstructed and illegal law SHARIAT as shariat gives full permission for mullas and nobody questions his credibility.
Islam finally created so many sections, groups of terrorist under different banner.