We can disagree on many things, like what day we choose to worship on, or if we believe in the rapture as pre trib, mid trib or post trib.
We do not, however, have the option of disagreeing on the ONLY DOCTRINE that really matters. And that is, how do I get saved? What do I have to do to go to Heaven? That is the only doctrine that we must get right. It's the only doctrine that God does not allow us to have even the slightest bit of wiggle room on. Not even the slightest bit.
If people can't even figure out how to be saved, it isn't even worth discussing anything else that they might agree or disagree on.
Some other folks wondered this very thing, so they asked Jesus directly...
Jesus answered, The work of God is this: to believe in the one he has sent.
Rome wants us to believe that Jesus gave an INCOMPLETE answer here.
Yeah, you have to leave the church which Christ founded and follow a wonderful group of navigators which sprang up sometime in the 1930's....I knew there was a direct route to Heaven....never suspected that it was this......sigh.