Some FRoman Catholics think Protestants are their worst enemy.
Just look at this mess they are in.
When I see all of this junk, I think to myself—I do not want to hear one critical word about Protestants. They need to take care of their own mess before saying a word against us. Frankly, I do not understand how anyone can still defend the Roman Catholc Church.
Therefore many RCs are essentially acting like Prots insofar as determining what valid teaching is today, based upon their judgment of historical teaching, versus simply following the interpretation of their present pastors, as per papal teaching.
But the historical teaching they hold as supreme is not wholly inspired, but is merely that of men.