Ulster Scots is a different thing than was they're referring to. Ulster Scots refers to (largely) Presbyterian descendants of Scottish planters who emigrated to the US. Adherents to the Anglican communion wouldn't necessarily consider themselves 'Ulster Scots'.

There are many Ulster Scots who are Scots in Ulster and haven't migrated to the U.S. See the references in the wikipedia link.

I'm Irish, so I'm entirely aware of that. I was specifically referring to those who had.

Your previous comment said:

"Ulster Scots refers to (largely) Presbyterian descendants of Scottish planters who emigrated to the US."

Which implied otherwise.

Brainfart.