Is this some sort of remnant of evangelical puritan protestant ideology?
I don't understaun this.
If you ask me, it'd make as much sense as Orthodox and Christians.... or Shia and Muslim...
I know not all Christians are Catholics but for feck's sake...
They're all Christians to me....
Edit:
It's a U.S thing but this is the sort of things I hear...
https://www.gotquestions.org/Catholic-Christian.html
I am a Catholic. Why should I consider becoming a Christian?
I now know more distinctions (apparently Catholicism requires duty and salvation is process, unlike Protestantism?) but I still think they're of a similar branch (Christianity) so I just wonder the social factor
Yeah. People have been killed over being Catholic in a non-Catholic Christian society and people have also been killed over being a non-Catholic Christian in a Catholic society.
But that doesn't mean that we can't or shouldn't differentiate at all between the dogmas of Catholics and the wider practice of Christianity.
I mean there are lots of non-Catholic Churches with European origins, for example Lutheranism and Anglicanism. So I think it's a bit more complicated than "otherizing" with respect to that specific dichotomy.