That logic makes as much sense as saying Indonesia couldn't be converted to Islam because it was already Hindu at the 700s and would have heard of the conquest of Persia.The problem is, England was already Christianized by the time of Mohammed. By the time that any Islamic missionaries could reach England realistically, the Britons will have heard of the conquest of the Levant, Iberia, and the invasion of Aquitaine. The only way I can think of without derailing Christianity entirely, would be for an Islamic conquest of the Isles, and that seems extremely unlikely unless France falls.
Here's an idea. Have England stay balkanized a bit longer while trade ties form with Al Andalus. Eventually, one of the various warlords converts to Islam in order to bolster his relations with the Muslims and invites Ghazis and other mercernaries to help him conquer other statelets, which allows him to unify England under a Muslim dynasty. Said Ghazis and mercs will then be granted titles of nobility, replacing the existing elites with an Arabized one, which should help the religion and the culture trickle down.
Eventually, in a few centuries, the Emirate of Anglistan would be majority Muslim.
That logic makes as much sense as saying Indonesia couldn't be converted to Islam because it was already Hindu at the 700s and would have heard of the conquest of Persia.
That is a very low chance to happen.What about Muhammad being expelled from Arabia, wandering in Europe, and eventually preaching Anglo-Saxons, creating an Islamic Bretwalda, that takes over all Britain before his death?
That is a very low chance to happen.
Hmm, surprisingly original and surprisingly plausible.
It likely wouldn't be named "Anglistan", tho - "-stan" is a Persian root, not an Arabic one.
Meanwhile, in France, at some point, an invasion of England will start to look mighty attractive,
You could have an Islamic Europe after a different Battle of Tours.
I see two big problems: pork and beer.
Forbidding pork might not be unthinkable: medieval Englishmen (if they could afford meat) ate more beef, fowl and lamb than pork, but they washed it down with roughly a liter per day of beer. They aren't giving that up without a civil war.
Perhaps the Imams would decide that only wine was forbidden? (too expensive and French for the commoners anyway), but that would likely lead to a schism with other sects.
You know, they could simply ignore that. Central Asian Muslims usually did, and that got carried into India and Persia.