Easy. Why do people fight ? Because they think they can win (easily). The population of islamic countries, even if they agree to fight the west, they will not agree to fight the west at any cost. In fact 99,9% of muslims would not fight the west if there is even the slightest cost involved.
The easy way out would be to cause another war, say between Iran and Saudi. Or between Iran and Pakistan. Either they fight, and weaken themselves, or they agree to not agree and become a more tolerant society. If Saudi Arabia were to get involved in a war, that war would include mecca, including the possible conquest of mecca by another party.
I think the single greatest victory that America could score in this was would be that Iran takes over mecca.





