IRA was set up with an avowed political aim of securing Northern Ireland political freedom. And once they were in principal willing to disarm & join political process.
Their technique of Bombing was to place a bomb and give police the warning call to evacuate the people from target area. The armed attacks against civilians were sewered way back.
On other hand you fellow Jihadis detonate bombs for causing mass causalities among civilians, or even when they dare attack armed forces they do it from behind civilian cover. And short of Non Muslims disappearing from face of earth; they do not have a netiable goal.
