John mentioned “many antichrists,” indicating that the antichrist is, not an individual, but a collective term. People or organizations making up the antichrist spread lies, deny that Jesus is the Christ, or the Messiah, and try to distort the relationship between God and His Son, Jesus Christ. Those who make up the antichrist claim to be Christ or his representatives, but since “they went out from us,” they deviated from true Bible teachings. Furthermore, this group was present at the time when John wrote his letter, in “the last hour,” presumably the end of the time of the apostles.
What about today? People and organizations making up the antichrist still oppose Christ and his teachings. They deliberately spread lies and deceptions with the intent of confusing the identity of the Father, Jehovah God, and of His Son, Jesus Christ.