What if Muhammad of Islam started as a warlord promising hot females in heaven, then religion

1: Muhammad starts as a warlord, promising hot babes in afterlife to people who fights for him. (which is all it is)
2: People fights for so long, then you have some eyewitness testimony of people saying this to another guy.
3: They use a methodology to see who is reliable, and then you get hadith chains of reliable vs unreliable people
4: They make a religion out of it 200 years later after the events took place. Made by esoteric religious intellectuals, collections of sayings put into those events and organized that way. And there you have Islam

Well thats just theory i have on it, just sorta interesting in historical religious perspective.

Text sources in this video:
https://sunnah.com/tirmidhi:1663
https://en.wikipedia.org/wiki/Charles_Manson