Earlier quoted context omitted.
The Roman Catholic Church does not recognize, in a doctrinal sense (obviously, it does in a secular material sense) the existence of any other Christian Churches [0]; it takes the “Catholic” in its name quite seriously. From the doctrinal point of view, there are no non-Catholic Christians, just Catholics of various degrees of imperfection, is and everyone who intends to join Christianity, or to join someone else to…
It's not clear to me whether Rome accepts Christians who completely reject its authority. The central point of Lutheran Protestantism is that it's open source: anybody with a Bible can decide for themselves how to implement it without asking for permission. Of course there's value in a community of believers but the requirement is just to gather "two or more". I guess Protestants have a harder time deciding who's a C…
Rome absolutely accepts them as Christians.
It views them as wrong, but it does that for plenty of Christians that don't completely reject it's authority, too.
> The central point of Lutheran Protestantism is that it's open source: anybody with a Bible can decide for themselves how to implement it without asking for permission.
It would seem to me that the central point of Lutheran Protestantism is that there is a right way to implement Christianity, that right way is clear in Scripture, and having intermediaries between the believer and the Scripture is a barrier to the believer finding the truth in Scripture.
Lutheranism also seems generally pretty strongly defined by a particular opinion on what the right answers are, or at least a wide range of them, though somewhat internally divided by the degree of certainty ascribed to those answers.