WRONG.
The bureaucratic political powermongering elites of the club in Rome cleverly capitalized on some traditions some Christians were fond of 300 or so years after Christ.
However, startlingly, most of the Marian heresies were not very formalized until the modern era.
IIRC, —many even in the last century.
Incredible.
Q: How do know that for certain someone is not a Christian?
A: When their response to Christians is to shout: WRONG!