It didn't? You said while laughing out loud...
NKJV - Little children, it is the last hour; and as you have heard that
the[fn] Antichrist is coming, even now many antichrists have come, by which we know that it is the last hour. (fn indicates
THE was omitted)
If the KJV had NOT omitted the word THE, people would realize that the verse does speak about an anti-Christ (man)
coming." The verse doesn't actually imply an anti-Christ spirit IS COMING because John said, "even
now many antichrists have come....but we assume he's indicating that because he said, "by which we know that it is the last hour.".
Interlinear - "the anti-Christ IS coming" -
Textus Receptus
In addition to an anti-Christ spirit that existed since the time of John. 1 John 2:18 clearly speaks of THE anti-Christ as a specific anti-Christ.
The word THE indicates a 'specific' anti-Christ individual is coming distinct from, "even now many antichrists have come."
Who is the HE you're referring to and who is the IT?