“Your error possibly derives from confusing a non-RC Christian with a Protestant.”
I posted no error whatsoever and nothing I said derived “from confusing a non-RC Christian with a Protestant” for I have never once made that mistake in my entire life.
“Protestant is nowadays more of an RCC term applied to non-RCC worshipers of God than it is a Christian “What we believe” designation.”
False. I apply the term Protestant only to Protestants. I have never applied it to non-Protestants. Not even once.
“There are different groups of RCC members.”
False. There are no “different groups”. There are Churches. A Byzantine Catholic is Catholic but he is not Roman. A Russian Orthodox in Communion with Rome is a Catholic, but he is not Roman. These are sui juris Churches. There are no “different groups”.
“There are also many groups (fellowships, assemblies) of believers in and followers of the Lord Jesus Christ who do not consider themselves protesters against only RCC anti-Christian teachings.”
All Protestants are still Protestants no matter what sect or ecclesial community they belong to. A Methodist is a Protestant, a Baptist is a Protestant, a non-denominational is a Protestant. Whether or not they “protest” against anyone is no longer relevant to the actual existence of their Protestantism.
“But, yes of course, there are still some mainline Protestant denominations. In recent years at least, two or more of these Protestant groups have been following the lead of today’s pope more than they have the unchanging Lord Jesus Christ.”
Protestants always followed their own desires. They never really followed Jesus in the first place. If they did, then there would not be so much formal fragmentation and indifferentism among them now would there?