I was speaking in terms of trying to find a system that's the culprit. The word "antichrists" would make that possible.
As opposed to the "son of perdition" which seems clearly to be speaking of a person, imo.
I'm not thrilled at all about mariology, but I don't think that Catholics deny the Father and the Son. They are historic trinitarians.
That doesn't mean the Popes are.
Didn't the last Pope increase the number of Cardinals because the 'liberal' wing of the RCC had so many members who rejected the Deity of Christ (such as Carlos Martani-bible corrupter.)
You are correct that the Son of Perdition will be a real man as will the False Prophet, who I believe will be the Pope, forming a false trinity (Satan, Anti-Christ, False Prophet) Rev.16:13