The manchild is not JESUS. When JESUS was born He came from heaven, but the dragon didn't come down from heaven, he stayed in heaven, you know? In no way could the red dragon be stood before Mary when was ready to be delivered, for to devour JESUS as soon as was born.
Don't you still understand that JESUS is GOD, and GOD wouldn't leave Satan in front of His mother when He was made flesh? Your interpretation is horrible, tenebrous, evil.
In the other hand, Isaiah 9:6 has nothing to do with Revelation 12; I mean, Isaiah 9:6 has nothing to do with the manchild which JESUS said in Revelation 12 it would be born. There is a great mystery here, and it is that JESUS came from heaven, but the manchild of Revelation 12 is from the earth(mystery?1Corinthians 1:27-28), and the manchild was born here in similarity or at likeness to the birth of John the Baptist in the first coming of JESUS, the voice that claimed in the wildness-Isaiah 40. Paul Apostle said: "The Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first", as is written in Daniel 12:1-4. (See, Revelation 12 and Daniel 12. Coincidence? No, its is not, for me)
Be careful with the Word of GOD, the Word is GOD, you know?