ca. 1096

[Possible/Probable] “Forced Conversion of Jews” issued by Count Emicho [Duchy of Rhineland; Present-day Germany] 

Commentary from Other Sources:
1) 1,200 Jews committed suicide in Mainz to escape Count Emicho’s attempt to forcefully convert them. All in all, 5,000 Jews were murdered.

Avraham, Yerachmiel Ben: All in the Name of Jesus: The Murder of Millions (2016)