Actually, we have documented proof of there being archaic sects or heterodox theological perspectives within Early Jewish Christianity, that described the Holy Spirit as the “mother” of Jesus, invoking the femininity of the hebraic shekhinah.
For instance, we have testimony from Church Fathers commenting upon the non-canonical Gospel of the Hebrews, which probably contained traditions dating from the first century:
The Gospel of the Hebrews (Greek: τὸ καθ’ Ἑβραίους εὐαγγέλιον), or Gospel according to the Hebrews, was a syncretic Jewish–Christian gospel, the text of which is lost; only fragments of it survive as brief quotations by the early Church Fathers and in apocryphal writings. The fragments contain traditions of Jesus’ pre-existence, incarnation, baptism, and probable temptation, along with some of his sayings. Distinctive features include a Christology characterized by the belief that the Holy Spirit is Jesus’ Divine Mother and a first resurrection appearance to James, the brother of Jesus, showing a high regard for James as the leader of the Jewish Christian church in Jerusalem. It was probably composed in Greek in the first decades of the 2nd century, and is believed to have been used by Greek-speaking Jewish Christians in Egypt during that century.
“…Even so did my mother, the Holy Spirit, take me by one of my hairs and carry me away on to the great mountain Tabor…” (Origen, Commentary on John 2.12.87)
So if these codices really do come from a Jewish-Christian milieu in the 1st-2nd centuries - the faction St. Paul labelled the “circumcised” who disliked the opening of the nascent church to the gentiles without strict adherence to the Torah, we would expect to find God described as both male and female…which, we do oddly enough…
As such, this “hermaphrodite” understanding of God is one of the factors tending towards the possibility (again not suggesting this to be the case) that the codices really are authentic and do go back to the 1st or 2nd centuries.
If you were going to forge something about Jesus and pull it off successfully, chances are that you would want Christians to recognize it as something familiarly Christian. While these tablets do not directly conflict with the gospel narratives, these theological peculiarities are not “mainstream” and are actually quite bizarre to modern orthodox Christian minds.
But ancient people were often very bizarre if you consider them from our perspective and so a hermaphrodite Divinity might have been acceptable to them.
The text may be a forgery but this detail has given some scholars pause, since if the metallurgical analysis is correct and the lead has not been smelted in modern times, at least within the last 150 years, how likely would a forger from before then be to depict God in such a heterodox manner and expect it to be taken as a genuine artefact?