Any flesh-born man can do whatever God has entitled and empowered him to do.Christ's title of Immanuel is a title of definition of His Mission as The Saviour. NONE of God's titles debase Him into some man that had sin or could have sin. This fact alone is what defines the title Immanu-el (God with us), because it is about God The Son being born in the flesh like us through woman's womb, and being without sin, and thus having the Power to forgive our sins.
NO other flesh born man can do that, which is why Jesus is God The Saviour which The Father sent. And that function is what is tied forever to His name Immanuel, because God was manifested in the flesh as The Saviour, and that is about Jesus of Nazareth, The Christ.
1 Tim 3:16
16 And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.
KJV
Anyone who denies that Jesus of Nazareth is God The Saviour is an antichrist, because they have not believed on the ONLY Begotten Son Whom The Father sent to die on the cross as the Perfect Sacrifice for one and all time, forgiving the sins of those who believe.
Anyone who deifies Jesus Christ, a mere man, is an antichrist, for he has denied the son. He will not accept the love that the Father has for His preeminent creature, unless that this creature is God himself. Thus, completely bastardizing and annihilating the principle of Son and God's love.