OK so you’ve hypothetically destroyed 3 important Islamic cites and hundreds of millions of people.
So far so good .... now ... have you destroyed “radical Islam”?
Did you get rid of the 1/3 of Muslims who are fundamentalists or radicals (the theory of the person I asked for a plan from) and caused the rest and all their descendants to never ever be radical?
I believe could be mitaken) once they were shocked to the core and lost their ‘symbols’, they might be open to entering the civilized world. Reluctantly for a few hundred years, but what the Hey?