Note that the antichrist is not one particular fallen being like the beast of Apocalypse but anyone who denies Jesus one way or another. If you deny that YHOSHUA MESSIAH is not YHWH in flesh, you are an antichrist. The antichrists deny that Jesus is the Messiah (Christ) and that He did not come in the flesh. Apostle John already testifies who Jesus the Messiah (Christ) is: YAHWEH, who is the Creator of all things and mankind in the book of Genesis (John 1:1-3) because the Old Testament speaks of no Angel as having created anything. Neither Angel of YHWH, nor Angel Gabriel, nor Archangel Michael is portrayed as Creator in the Bible but Jesus (Isaiah 43:15). Jesus holds and was attributed the name and titles of Isaiah 43:15 even by the demons (Mark 1:24, Luke 4:34), yet men deny the testimony of fallen angels who know Jesus and pointed him out to men. They must be speechless.
According to Judaism, in Heaven, there is only one Jehovah or LORD, one Holy One, one Creator, one King. As Jesus had been conceived as the Holy One by Mary, saluted as Adonay by Elizabeth, born as Messiah YHWH, according to Angel of YHWH in Luke 2:11, recognized as the Holy One by the demons, as the Creator by Apostle John, as King by Nathanael of Israel (John 1:49) and sought as such by the Magi (Matthew 2:2), it is evident that Jesus is the God of Abraham , Isaac, Jacob, and Moses in flesh.
I am Jehovah, your Holy One, the Creator of Israel, your King. Isaiah 43:15 ASV