Asklemmy

I've heard "Protestants and Christians" too. It hasn't been that long really since some of them openly hated the other.

You are correct, Catholics are a subset of Christianity... But similarly how people assume a "doctor" is a medical practitioner, Christians has become the informal name for "Protestant" or "evangelicals"

Basically "Christians" tend to mean, anything not "Catholic" (which is old school, visibly indistinguible from others in the Christendom)

Catholic my nuts

Think of it as two different tribes

Probably because depending on the context "Christians" is likely referring to "Protestants." There are some very significant differences between Catholic and Protestant Christianity, moreso than between Protestant denominations, whose differences tend to be a bit more trivial. Other comments make some good points, but it is not too far of a stretch to say that Catholicism may be different enough to be considered a separate religion (I don't know who gets to draw these lines). But in the most technical sense, yes, Catholics are a subset of Christians.

You really shouldn’t place the Baptists and Catholics under the same label. Remember those pages of the history books where Baptist KKK members would burn crosses on the lawns of Catholic community members, or run them out of town? You also shouldn’t place Protestants and Catholics in the same category, either. Remember one side throwing stones at the other in Ireland, or was that left out of history books? Catholics have been through a lot of abuse.