“Protestant Churches(fxd) don’t know much about the Catholic Church, and...”
...vice versa. I also do not know much about Presbyterians, Lutherans or Orthodox faiths but I am hoping to learn w/o calling their leaders “liars.”
Since I am engaged with sundry Protestants on this forum quite a bit, I know very well the Protestant doctrines.
Protestantism is based on lying about the gospel. The extrascriptural ideas about Bible Alone and Faith Alone were only possible because people trusted Luther’s knowledge of the scripture.
Orthodoxy is, of course, fine and by and large free from doctrinal error.