On the other hand, I’ve read posts by Catholics here stating that all Protestants and Orthodox are not part off the one, true, ordained by God Roman Catholic Church, and are therefore in actual fact dyed in the wool heretics.
On the other hand, I've met NUMEROUS protestants on FR who claim the only people who count as Christian are other fundamentalist, born-again, Evangelical protestants. The remaining 90% of people who self-identify as Christians are false, unbiblical heretics who have "never been saved", including most of their fellow protestants. They also have an annoying habit of pretending the 300-500 million Orthodox Christians around the world do not exist, and pretend like "only the Catholics" do things like venerate the Virgin Mary and pray to saints and call priests "Father"
yes as have I. There is nothing Christian about the pope of Rome.
All who believe that Jesus Christ is the Savior ARE Christians. They may be in different ROOMS, and decorate it differently, but they are all in the house of the Lord if they believe in Him.