A lot of people have trouble with the "Christmas" story. An unmarried pregnant teenage girl blaming her pregnancy on God. C'mon, who's gonna believe that?
That's the point, it was not meant for everyone to believe the Bible. The Bible is God's instruction manual for his children and believe it or not, we are not all God's children.
God did not come to earth in human form as is commonly taught. The baby Jesus is not God...he's a baby. A special baby, yes. God? No. He is a human, chosen by God to be the Messiah. Without his sacrifice, we would all be condemned; but he won't become the Son of God until the Spirit descends on him (Luke 3:22); which is why very little is known of his childhood. Jesus never claimed to be God and always referred to God as his Father. It doesn't make him any less worthy of praise, just not as God.
The "Trinity" can be confusing...how can God, Jesus and the Holy Spirit all be God? How can God speak from heaven, while God (Jesus) is on earth. And, if the Holy Spirit is God, why did God (the Spirit) light on God (Jesus) in the form of a dove?
At the risk of oversimplification think of it this way: God is a "single cell" (a Spirit); a cell is able to divide itself thru a process called "Binary Fission." Since God created "Binary Fission," it's not difficult to comprehend that God can "divide" himself and send a piece into the hearts and minds of his children. Thus, Jesus was the first-born of many (Romans 8:29) Jesus, like every child of God after him, has God's "DNA" (the Holy Spirit). Which is why Jesus said, "I and my Father are one." (John 10:29)
At Christmas we celebrate the birth of Jesus, the Christ; our Lord and Savior; who showed us the way to God is through Spiritual birth. The birth of Jesus, serves as a reminder that to see or enter the kingdom, we must be born again.
until you are reborn Spiritually...nothing else matters.