Greek vs. Latin
Vicar: (From Latin) vicarius, a substitute,
Anti: (From Greek) “against, opposite, instead of,
Vicar of Christ = Anti Christ
1John 2:18 Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
All the Protestant recognized the Antichrist not as one who will come later, but one who was always present with them: The Pope!