Granted, it's in the past, randomly appearing in the middle of the Arabian Desert right in front of Muhammad as he was preaching Islam. The snow conveniently lands on his hand, and all people there believe it is a miracle, as the the snow melts and turns into water, which saves a random child from thirst. Due to this miracle, Islam takes off much more quickly, and soon nearly all of Europe, the Middle East, India, Central Asia and most of Africa north of the Equator is Muslim. Forwarding to 1776,the British Caliphate is attempting to put down a Christian rebellion in its far off colonies in Al-merica, the name for the Americas here (Yes, I stink at names). In the battle, general Ali Washington is shot in the head and dies, and the rebellion is crushed. To show its power, the British Caliphate orders public execution all over the continent, alienating its allies, of which the most important is the French Sultan. Angered by the killings, and realizing the Caliphate's weakness, the British Isles are invaded, but then some ultimate being gets pissed off at me writing too long and screwing up history and smites some random person. You.
I wish I could have thought of a better ending.