[Born to Conserve]

“You don’t really believe that, do you?”

Believe what?

[AnAmericanMother]

That Catholics are polytheists, but somehow other Christians that "have the exact same belief" in the Trinity are not. Mutually exclusive.

I don't know of a mainline Protestant denomination that DOESN'T believe in the Trinity. And they're not all heretics. Some hold heretical beliefs, but others are merely in schism.