The Argument for Islam is very Simple:

[WinterHold]

It really is simple!

Illiterate Arabs with no education or knowledge of how the world works got suckered into believing a totalitarian fairy tale peddled by a merchant warlord who resorted to violence when his lackluster religion failed to convince anyone but the simple-minded. Take away the terror that Islam inspires in its own believers and it collapses like a house of cards. It is a religion so fragile that it needs to exterminate not only its external critics, but its internal doubters in order to survive; its ideas are that lame and crippled.

Eating people alive was one of the habits Mohammed's society did:

https://en.wikipedia.org/wiki/Hind_bint_Utbah

Also, they practiced organized torture against any difference:

https://en.wikipedia.org/wiki/Persecutio...by_Meccans

You're picturing it as if ancient Mecca was a paradise of knowledge, and then Muslims came and ruined it all.
Yes; the first Muslims were:
1-Arabs
2-Illiterate

But the Ottomans weren't Arabs, nor illiterate.





Illiterate.

Ever heard of Andalus?

https://en.wikipedia.org/wiki/Al-Andalus

What brought down the walls of Constantinople? ignorance??