There is a further issue here. Maximus contemptuously dismisses Gratillonius as "pagan," thus categorizing him alongside worshipers of the Olympian pantheon. Probably Maximus would not have liked it if the boot had been on the other foot: a Mithraist establishment classifying Christians as pagans? Or would Maximus have been a Mithraist if that had been the established religion?
A minimal requirement for mutual respect and understanding is that we describe others in terms acceptable to them:
Muslims should not be called "Mohammadans";
Catholics should not be called "idolators";
social democrats should not be called "communists" (these terms were synonymous but both have changed their meaning).
Are some Catholic practices idolatrous? It is important that we listen to Catholics and understand why they do not accept that description. On the basis of understanding, we might convert to Catholicism or continue to accept some other world-view. How much avoidable ill will is caused by wilful misunderstandings?