The Big Ol’ Mo’ changed the writing system and banned the use and learning of the former scripts in Arabia.
Oh, and he massacred the Jews of Arabia.
https://mosaicmagazine.com/picks/history-ideas/2021/07/the-7th-century-massacre-of-arabian-jews-and-its-legacy/
>>Oh, and he massacred the Jews of Arabia.<<
And Nazis massacred many more in Europe.