It's basically the Pharisees of the Old Testament. There is an article here which goes into detail. That is only one of the ways the Catholic Church has violated the word of God.
Thanks CB for the link!
And don't forget the Sadducees faction that was negatively influential at that time.
(Sometimes, it appears RC contrarians on FR RF are responding with computer-generated or cribsheet answers. Just deny, deny, deny, and always say the exact opposite of what a Christian says. Frequently doesn't seem like I'm communicating with a rational human...but rather a machine.)