Very good historical note, fulltimestudent!
At least your Priscillian had better luck than Hypatia a few years later. He was just beheaded. She was ...I don't want to describe, it frustrates me, but I tell you this: Priscillian was a LOT luckier that Hypatia.
And while Priscillian was a delusional who thought about intercourse with God, like the mystics and 'Spirituals' of Middle Ages, Ypatia was a serious scientist that wasn't even Christian! She was pagan (just in the name, practically she wasn't religious at all) and she was a thinking woman, in a world that was in its twilight. Christianity was on the rise, on the march, and no logical thinking being, even more a woman, could stand in front of them.
Why am I telling this? Christians did kill Christian heretics, sure, but they also killed other people. They killed, in general. It was like a habit. They stopped killing only when the worldly authorities did not allow them anymore to do so.
So, yes, it reminds us of the present day JWs and their shunning practiced, but jws only do what they inherited from their spiritual ancestors, the killers of Hypatia and Priscillian.