I think it’s probable that “the Christ” was the unknown twin brother of Jesus, and that he was kept imprisoned in Mary’s and Joseph’s poor home basement since not long after he and his brother Jesus were born, as per this previously stipulated contract between “the Magi”, which were actually some guys working for the early and then unknown Catholic Church, and Mary and Joseph themselves, until they pulled him out all of a sudden to let the romans put him on the cross and kill him instead of Jesus, to stage Jesus’ death, and then his resurrection.
Before that, Jesus, who was educated mostly by “the Magi”, and agreed to their contract and their plan very early in his life, also because Mary and Joseph made that contract before he and his brother were assigned to them by “the Magi” themselves, was mainly reciting “in sunlight”, with the oppressed, a plot and precepts which was written by “the Magi”, who based them on many more, selected madmen’s and “saints’” beliefs and, to some extent, even on his brother’s obviously growing madness, although it was probably mostly driven, in its development, and particularly in “the Christ’s” increasingly sincere conviction of being the son of “God”, by “the Magi” themselves, who were visiting him periodically in the basement.
After his brother died as one more poor christ on the cross in his stead, Jesus acted for the oppressed that last touching “bye, see you at the end of the world” scene that “the Magi” had written for him, and then he, Mary and Joseph got the big money that “the Magi” promised to them, and a permanent vacation far away from those territories, in exchange for their good services to the early Catholic Church, that was already planning to gain complete hegemony over the whole world.
The only christ i like is the one my father, who died in 2009, imagined and sang in 1979 and still tells in his Il sogno and Il cristè songs, which are as one song. You can read its lyrics in the video description, both in the italian original and in the translation i’ve done.