Many 'Christian' leaders embrace a celebration that has undeniably pagan roots, stemming from the winter solstice festivals, observing the rebirth of the sun.
The Catholic Church chose December 25 as the date of Jesus' birth, centuries after the fact. However, internal biblical evidence gives a very different story.
The names of God reveal His character and attributes, and so also with Jesus. The reasons for Jesus Christ's incarnation are revealed in His names.