Yeah I was also ver specifically thinking about Christian heresies, and not counting all the other religious wars/conflicts/murders going round.
Do always think it is funny that the whole magical staves thing which people think is some old norse early medieval thing comes from the 17th century and is a bit more christian (even if it is a strange offshoot, esp with iceland being mostly converted to Christianity in the 1000s). But that is unrelated to everything above, more that history is big and what we assume is often not correct and from the wrong periods. As I did here myself. Edit: wonder if there is an overlap between the staves and the sigils from The Lesser Key of Solomon, both of the sources for these things seems to be written in the same period (the lesser key is based on earlier works from what I could tell the sigils itself are always credited to the lesser key, so no idea if they predate that, I don't have much access to grimoires from the 1500s).
Think I have mentioned the story I heard here once, about the guy who wrote a program to find some large prime which he ran on the mainframe over the weekend, using up all the calculation budget his uni department had. And then they confronted him with the end result, and the number the program produced ended in a 2. (He had forgotten to code the -1 step).
This reminded me of that story. (At least in this case it actually produced a viable result (if costly), just with a minor error).