I mean you already own hell, Satan. How do you plan on expanding your business then?
We'll remove the Kaaba in broad daylight. Make the Muslims believe that god has abandoned them, possibly more than just them. While that's going on, convince millions of Christians and Jews across the globe that they should go to war against Islam. Fast forward a bit, maybe the fighting has moved to a large city. Convince the Christians and Jews that they have god's blessing.
You may be wondering what I'm going to do next. The answer: Nuclear missiles, from Russia with love. New York, Jerusalem, near-pyongyang-but-not-actually-pyongyang, London, etc. In theory, the nukes should destroy most city centers while the pyongyang strike should wipe out most of East-Asia.
[my battery is dying i'll finish this later]