Thank you for your post.
No, that’s not the implication.
Although, there are now and have been a number of “Protestant” or “non-Catholic Christian” denominations who consider or considered themselves to be Christian and by definition or behavior, were/are not.
For example, many “devout followers” considered the Peoples Temple, Heaven’s Gate and the Branch Dividian’s to be the “one true Christian denomination”. I don’t believe that they were.
I know that there does exist many Protestant denominations that are similar to Catholicism, in one way or another. Some closer than others. And, some who believe that they’re close in belief, when in fact they are miles apart.
I believe that any shared belief that any of these denominations have regarding Christianity are good, true and correct. Obviously, they would be, because they originated as Catholic beliefs and/or came from the Catholic Bible.
I also believe that these denominations have deliberately chosen what Catholic, or early Christian beliefs they were going to adhere to and which ones that they were going to reject. However, there main beliefs originated , or came from the Catholic Church who preceded them.
All of these denominations share a belief in the same God, The God of Abraham, [the God] of Isaac, and [the God] of Jacob (Acts 3:13). Another thing that they all have in common, is that they all site NT verses from a book approved by the Catholic Church and Catholic Popes… the Bible.
The main difference that these groups have with each other, is that some, by way of a valid baptism can call themselves Christian but that doesn’t mean that they belong to the one true Church. It means that they have accepted a belief that originated in Catholicism. If not for the Catholic Church and the Catholic bible, none of these religions or denominations would exist today. Then again, if not for the early Jew’s and their exodus from Egypt, would there be Catholicism today. That’s why Catholicism is considered a Judeo-Christian religion. Am, I wrong?.
How are these religions different?
How are they the same?