I was reading up the confusing number of groups that arose in the 1st century — you had various types of Jewish Christians, Marcionite Christians (who completely rejected the OT), Gnostics and even the Sabeans (who still exist in Iraq!) who I find the most fascinating — they say John the Baptist was their prophet, not Jesus (who they call a false prophet!)
Facinating - I’ll have to read up on them...I always enjoy discovering oddities or unusual groups - keeps life interestng. Still don’t know what to make of the Yazidis - very odd Kurdish sect who are worth reading up on!