China, Japan, Koreas could create an offensive alliance against the global Kalifat.
(Smaller Asians nations are excluded for varioud issues, russia too).
Better to have the protocols in place before the fall of the west.
Sadly i don't see how it couldn't become necessary later on.
You know the story of the fly and the window... and the one of the nest and the bird? Where to find water in the desert?
I am not sure that the "people of the books" have an idea about how the consequences of their various beliefs will have to be managed.
At least they can all eat scramble eggs...
And on a positive note will be a nice space craft factory once retrofitted... small ones;).