I’m thinking what the Catholics are promoting sans any proof that the apostles taught it is “another gospel” and is to be accursed.
Well sure it is...God didn't authorize over 30,000 verses of scripture which included those verses that warn us about religions who come up perverting those scripture, just to give his church to one of those religions who is perverting the scriptures...
And it is not just that they pervert those scriptures with their phoney interpretations and traditions (which aren't traditions), they add to and remove from the scriptures words and phrases so they can make themselves equal with God, inventing doctrines and laws that no apostle nor prophet nor Jesus ever taught...