Just because I don't agree with the teaching of the preexistent Christ does not make me an antichrist.
Who is the liar but he who denies that Jesus is the Christ? This is the antichrist, he who denies the Father and the Son. 1 John 2:22
. . . and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you heard was coming and now is in the world already. 1 John 4:3
I agree that Jesus was the second Adam - human. Again, it all lies in our understanding of scripture.
How is Jesus the second Adam ? certainly nothing that relates to John would suggest such a thing. I don't understand how we are getting from A to B. The only way I can half see a connection is that EL (Sumerian Enlil ) was one of the Gods who partook in the creation of "Man" .. what the creators called The Adamu .. These creator God's are the "Like Us" and "In Our image" in Genesis ... page one (1)
Most folks do not make it through understanding of the first page.. of the book .. thus any connections to Jesus would be born out of a misunderstanding of the text .. straight off the hop.
Now .. EL was one of the creator Gods .. who ended up as the Most High God of the Canaanites and thus was the Most High God of Abraham.
Now .. El is also the God that Jesus follows .. as opposed to the one he calls .... The Devil .. who we might refer to as the Anti- Christ for a number of reasons .. that one is the National God of the Israelites YHWH ... and its nasty twin named Jealous..
Now .. EL is the God who adopts Jesus as a man of 30 .. puts him through the trial where he is tested by one of the Sons of God .. a very powerful God and favorite of The Most High God .. somehow has become chief God over the earth according to the author of Matt.
So the Adamu ---were the first humans .. a hybrid race of beings which were a mix of some primative earth creature and a God. ..
Fast forward and we have EL adopting one of these humans ... in the way Sargon of Akkad was adopted by a God ... went on to unite the city states of Mesopotamia into the worlds first empire ~ 2300 BC .. Sargon did .... so can see perhaps some relation possibility there ? but don't get the relation to the creation of the Adamu.
now the Adam in the Garden .. don't even want to go there .. but perhaps you have made some connection there ? I can't see it.