Learn it first. Then we'll talk. But what you need to look for is "plural marriage" and then look for "germany" within those results using the "find" command on your browser. Then you can find out what people CLAIM the RCs were up to back in the day. Note, I did not say the pope did it, just that I've seen it asserted ~ hence the word "supposedly".
If you want to get uppity about Religion I'd like to remind you that the Guise Faction conducted the first ambush in the French Religious Wars, so it's ALL your fault!
In Texas that is called bullshitting.
In more polite phraseology it is called spreading unsubstantiated rumors or lying.
I have seen it asserted that my tagline is an actual Lincoln quote is no different than what you are doing.
“what people claim” isn’t factual but you repeat it as if it were, that’s called gossip and passing around urban legends.
Rather than simply apologizing for the error, you double down with bullshit.