Oh, good ole Iggy...It's difficult to know if Ingatius really existed, since the writings attributed to him were forged by other people a couple a hunderd years later...
But even if Iggy actually did write that, we know there was no capital 'C' on catholic, don't we...That forgery as well was added later by your religion...
You don't suppose the fact that Koine Greek had no capital letters had something to do with that, do you?