I didn't read the whole activist article, it was among few articles I've found that list the words said when Catholics renounce the pope during Chrismation... rest of the article probably is trash.
I standby the notion that Vatican I Primacy is a heretical idea.
(By the strict definition of the word heretical.)
Also there are numerous schismatic churches which did nothing more consequential that ceasing power and misinterpreting one piece of the doctrine, and are regarded as heretical churches.
The terms are beside my point however; my point is the modern Catholic interpretation of primacy and the uniate church are the key points of contention between the churches.