The point he was making is that certain thing are essential to calling yourself a Christian. One of those points is that the second Person of the Triune God became human.
(Joh 1:14 KJV) And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.At the same time He retained His divinity.
(Col 1:19 KJV) For it pleased the Father that in him should all fulness dwell;There are many areas of the scripture that lend themselves to interpretation. This is not one of them.
homo unius libri