Even Sinai sounds like Sana From yemen, what about Pau who went to arabia and spent 3 years learning over there, and most people here say arabic started to be written in the centurey of Mohamed, so he went south to arabia to learn from the jews after all, at least that's how it sounds
About the sacrifice ithere is somwhere where it says after the sacrifice and his patience we granted him Isaak
I guess the story of who was to be sacrificed is not important in the Quran