> >there is not agreement on what Christian belief _is_
> this isn't true at all.
Yes, it is.
> It's quite simply an Abrahamic religion based around following the teachings of Jesus Christ.
That's not even the most common of the competing ideas, in part because it is useless because it just pushes the lack of consensus out one level because there is no consensus on what, if anything, are “the teachings of Jesus Christ”.
There is a broad consensus among the theologians of communities making up the vast majority of self-described Christians on what thr boundaries of Christianity are, but it excludes a fair number of other self-descibed Christians, and even common members of those communities often have narrower definitions.
> but you can tell what is and isn't a Christian church.
Lots of people “can tell”, but they won’t agree. Where its important to a discussion, people who are careful will define the term as it applies to the specific discussion. There is no one true right answer separate from specific context of usage. (This is true of language generally, but its especially true of trying to do binary in/out boundaries of communities or other spaces with near-continuous variation.)
> this isn't true at all.
Yes, it is.
> It's quite simply an Abrahamic religion based around following the teachings of Jesus Christ.
That's not even the most common of the competing ideas, in part because it is useless because it just pushes the lack of consensus out one level because there is no consensus on what, if anything, are “the teachings of Jesus Christ”.
There is a broad consensus among the theologians of communities making up the vast majority of self-described Christians on what thr boundaries of Christianity are, but it excludes a fair number of other self-descibed Christians, and even common members of those communities often have narrower definitions.
> but you can tell what is and isn't a Christian church.
Lots of people “can tell”, but they won’t agree. Where its important to a discussion, people who are careful will define the term as it applies to the specific discussion. There is no one true right answer separate from specific context of usage. (This is true of language generally, but its especially true of trying to do binary in/out boundaries of communities or other spaces with near-continuous variation.)