Actually Shoonra, the practice of “pinning the tail on the antichrist” is a 20th century fundamentalist habit…..resulting from the decades-long indoctrination into Futurism by the likes of Lahaye, Lindsey, Van Impe, etc.
Futurist prophecies never come to pass, thus, every generation is forced to “upgrade” their candidate for the antichrist in order for the false teachers to avoid detection as false teachers, and to keep selling their books.
Until the 17th century, when the Jesuit Alcasar put out the very first Preterist commentary, Christianity had been unanimous that:
1. The pagan Roman Empire was the restrainer of 2 Thes. 2, the expected fall of which would usher in the man of sin.
2. The Papal Roman empire was the fulfillment of the prophecies concerning the man of sin, the beast from the sea, the whore of Babylon, or all of the above.
Did you look up what “Vicar of Christ” means?
Did you find any of those papal decrees or RCC councils to examine?