After investigating one of the possible origins of antisemitism in Islam , I end up with the story of Sallam ibn Mishkam , a Jewish that rejected Muhammad as a prophet.
For the whole story , see here : https://en.m.wikipedia.org/wiki/Sallam_ibn_Mishkam
The thing I’m curious about is how did they know that he’s a fake prophet ? Is there something written on the Torah or any other religious Judaic scripture the appearance of a false prophet ? If so , how is it described ?