Translation for people that didn't take divinity classes when they were younger:
By "traditionalist" they mean "pro-fascist." As in, the super racist part of the Catholic Church whose founder actually helped nazis round up Jews in Lyon for the Holocaust, and who was mad when France was liberated.
As recently as a few years ago, their bishops were still denying the Holocaust publicly, and making super racist comments about muslims entering France.
The Pope says "You can't just make new bishops yourself! We need to filter out your worst ones! The pope approves bishops!"
They kept doing it.
So the Pope said, "Fine. You can keep doing that, but now you're not Catholic anymore.*"
(*Technically still Catholic, but excommunicated)

