I used to dream of ways to improve Islam and they all involved causing Islam to morph to something else. One of my pet theories (desires) was to drop a BFB (typical American glass pavement talk) on Mecca. Here is the device I longed for: a 25 megaton (50 would be best) dropped as a bunker buster - creating a whoper of a giant crater right where Mecca used to be. But that alone would not suffice to generate an evolution of Muslim thinking. No, the device I dreamed of would be wrapped in thick layers of really dirty materials, so the bomb would resemble a large box car. This would produce a really dirty device that would set the terrain around the holy crater to glowing for 25,000 years or more. (Pilgrimage to that...) Imagine praying toward that...
This would force a major rethink in Islam. But I gave up such maniacal day dreams when I realized something worse could happen - the Muslims could all end up morphing to Mormonism, or even worse to Christian theology! Besides, without Islam Europe would just end up worshipping some sort of Star Wars or Star Trek movie based religion. Without Islam Europe would just depolulate into a waste land of ruins and old people dragging around their latest Post Modernist Marvin the Robot philosophy. Nature abhors a vacuum, and since mankind IS designed to run around in some sort of wishful thinking daydream - nature wants to see to it that Islam becomes Europe and Europe becomes Islam. And being a philosophic savage myself - devoted to primitivism, and pagan faith - I think Islam should inherit Europe, before the last old lady there turns out the lights.
On this blow back theme, Islam's greatest threat is from all the Muslims that are moving to the USA. ANyone who knows America, knows that it takes fine cheezes from around the world and blows back veleeta! I warned my old Zen buddies back in the mid 70s that if Zen took off in America it would produce a fastfood McZen that would over time seep back across the Pacific Ocean to infect Asia. And this is indeed what happened and is happening. In time the result of Muslims moving in the USA will be to finally push their numbers here to a critical mass - and suddenly from their children and new converts an American version of Islam, McIslam, will blow back to the Middle East. In that day Islam will wish for the day when all America sent their way were ships, troops, and planes.