Will read the post more thoroughly later. Unsure if you’ve heard of Khayyam, the 11th century persian poet, mathematician & some call him a ‘mystic sufi’ too. He is generally known to be an apostate among practicing muslims. In one poem referring to arab-muslim invaders of iran he wrote: “You drink the blood of men, we drink the blood of grapes,
Be fair, which one of us is more bloodthirsty?” — again, unsure how familiar you’re with traditional persian literature, poetry & culture which is largely based on zoroastrianism & later (had to) incorporate islamic sensitivities or be mindful of it to be acceptable ... drinking wine isn’t prohibited in zoroastrianism. Anyhow, historically the natives of those lands conquered by islam knew islamic savagery quite well. But must add that mongol invasion was even more barbaric than muslim arab one in iran.
Interestingly, the Mongols fairly readily converted to Islam when they remained in the Crimea etc. Birds of a bloody feather.