Naw, they duped you...The word catholic has nothing to with Christianity or religion...
Example of catholic in a sentence
She is a novelist who is catholic in her interests.
: comprehensive, universal; especially : broad in sympathies, tastes, or interests
Catholic with a capital 'C' is something entirely different...It is the name of a specific religion which is not the 'universal' religion of the scriptures...
“...Catholic with a capital ‘C’ is something entirely different...”
O.K., if it is something entirely different, then what does the word itself mean? If you don’t know, then are you scholarly enough to SHOW that it doesn’t refer to “universal” in its original usage?
Catholicism IS the sole universal Christian religion of the scriptures.