Victory is not defined as a ruinous war that involves probably 1/6 of the land mass of the Earth, and the deaths of at least hundreds of thousands of people.

Victory is not defined as the obliteration of houses of worship.

Victory is not defined as the social and economic collapse of a huge wartorn region that would inevitably follow, as the night the day.

No one would benefit from such an outcome except people who enjoy the suffering of those who don't look, dress or worship like them. Even their enjoyment would come to an end, because that kind of thing comes home to roost after a while. In the case of a large and valuable region like the Muslim world, which incidentally sits astride the world's trade routes, it would be sooner rather than later.