I think it’s probable that “the Christ” was the unknown twin brother of Jesus (let’s call him Diego), and that he was kept imprisoned in Mary’s and Joseph’s poor home basement since not long after Diego and his brother Jesus were born, as per a 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, was mainly reciting “in sunlight”, with the oppressed, a plot and precepts which were written by “the Magi” to persuade them to abandon or never engage in class struggle, to always turn the other cheek.
After Diego died as just one more poor christ on the cross in stead of Jesus, thus increasing in the eyes of the oppressed Jesus’ credibility as a major threat to the powers that were, Jesus acted for them 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.