Best of luck there, but since the alleged shooter is protected species, there will be loud calls to go after all the guns instead.
My only advice is don’t give an inch on gun control and instead to get the debate where it’s needed (i.e., just why are Scandinavians inviting in so many of these people, and what exactly did anyone expect to happen).
This is what happens when Socialist countries start to grab guns. “Licensed” means confiscation and gun owners are afraid to carry for fear of losing their gun rights.