Why Christianity is more prone to schism and totalitarianism than Islam

I wonder how much worshipers actually bother about religious doctrine in contrast to their favourite rituals of their religion.

If people were being honest, having read the Koran, they would have to agree that there is nothing particularly contentious about it.

What they do not like, probably, is the prostrations that come with the Islamic way of worshiping Allah, and prefer hymns, incense, sitting in pews in grand ancient buildings ...

Many Cultural Christians probably do not really believe that Christ really is God or that they are eating the flesh of Christ and drinking his blood when they participate in Holy Communion.

Perhaps the Muslims who do convert to Christianity do so simply because they prefer the showmanship of Catholic rituals, not because it came upon them, as in a revelation, the mystery of the Trinity. (Indeed, I would go so far as to suggest that the totalitarian horror of the Spanish Inquisition was a direct response to Muslims and Jews who blasphemously questioned the very vulnerable and incoherent doctrine of the Trinity, which of course  "explains" Christ's divinity.)

However, reading a little around the subject of religious intolerance in England, it seems that the Muslim way is less schismatic because it is simple and undisputed.

Catholicism involves great concentration of power and centralisation too. Islam is more diffuse because it is more securely standardised - no arguments about how they worship or which prayer book to use.

Clinging to Christianity is the moral equivalent of clinging to your Reliant Robin when you have a BMW (with its handbook still in the glove compartment) and know you have a long and arduous journey ahead of you.