This is my belief. You don't have to accept it.  I believe that some spirits can manifest in and through many people.  I don't think there is necessarily one Antichrist. I think there may be one Antichrist spirit but it can possess many people to a greater or lesser degree.  Same with satan or any of his demons.  This is what happens when we see mass hysteria. Many people are possessed by the same spirit. Vade Retro Satana.