Excellent idea.
Take out Mecca, and that big black rock, with nothing more complicated than an air burst about 500 feet above the target area.
Hell, it would not even have to be nuclear. A “Mother of all Bombs” (Massive Ordnance Air Blast), detonated like that, would flatten just about everything within a radius of a couple miles, including all the pilgrims making their hajj.
It would sharply curtail religious tourism.
ISIS wants it gone.