That's the fault. Don't isolate them. Talk to them. Same applies for terrorist groups.
I was going to keep out of this but there's a new kind of terrorism now. Until recently, even the most violent terrorists had a grievance of some sort & could be negotiated with. The ones we're faced with now appear to have no aims except terrorism itself.
How nice it would be if we could settle all the world's problems by diplomatic means, however long it might take. Unfortunately the human race has a natural distrust & fear of the unknown, even if it poses no threat. Another human failing is that those with strong beliefs in anything try to enforce those beliefs on others. This is what causes a lot of conflict & always will.
Thankfully the World is safe from a nuclear war as we know it.
I can remember a few times during the "Cold War" when we came very close to a real nuclear war, Armageddon. This was narrowly avoided but I'm not sure I feel any safer now.