EDIT:
Not going to lie, I am almost entirely sure the predominant religion of Egypt was Paganism, with multiple Gods, and each God about an element of life. Also, Jesus was actually born in the summer. There are 3 different accounts of what happened on the night of Jesus' birth, one of them being a star and 3 kings. Another is a few poor shepherds that were hanging around the manger going into it and talking to Mary. Jesus was a carpenter, but nice try. Jesus was baptized before his 30's. Healing the sick is a pretty common theme of being holy. Crucifixion was very popular in the old world. Jesus and God are not metaphors for the sun.
I'll grab some information about the movements in the sky relating to the story of Horus, Jesus, and many other religious figures.
The star in the east, Sirrius, is the brightest star in the sky. On December 24th it aligns with the three stars in Orion's Belt, which has been apparently named the Three Kings since ancient times. The three stars and Sirrius point towards the Sun rise on December 25th. The birth of the God's Sun on the Winter Solstice. The kings metaphorically "follow" the East Star to the Sun of God. The constellation Virgo is known as the Virgin and the glyph for Virgo is an "altered" M (hence why the virgin mothers always have a name starting with M). It is also known as the House of Bread, because it represents August and September, the time of Harvest. Bethlehem is literally translated into the House of Bread. As the days get shorter into December the ancients associate it with death, and by December 22nd the Sun reaches its lowest point in the sky, where it resides for 3 days under the constellation of the southern cross (crux). On th 25th it rises once again in the sky.
So, the Sun (Horus, Jesus, etc) died on the cross (Southern Cross, Crux, crucified), for 3 days, until it was born once more.
That is a great explanation for your so called "Saviour" and a good indication that the bible was merely explaining the Universe through metaphors, which was the only way to do so at the time.
EDIT: Also, one can be a teacher and still follow another profession. Google Jesus the teacher.