Christmas is the only holiday (where it is observed) which is a result of a direct involvement of the divine interference to the humanity. It is uniquely separated from the other holidays (humanism) if you will.
Sin came into the world by the temptation of the rebellion of the angelic being called Satan (the Devil) and how dare he was not to minister our first parents but to disalign them from God, the Creator. This act of Satan reveals how evil he is (his core is evil only) while the other angels (except Satan’s followers afterwards) are all ministering angels who glorify God through their serving in behalf of God. By his act of temptation to Adam and Eve, we can tell how bad Satan is as God prohibited Adam and Eve from partaking the tree of knowledge of good and evil, עֵץ הַדַּעַת טוֹב וָרָע, (Genesis 2-3) as a sign of Satan’s existence by his own choice of rebellion against God (…after iniquity was found in him, Ezekiel 28:15b).
All creation depends on God, the Creator, while the rebellion (sin) lives without God, in need of depending on God’s resources. Satan cannot do anything without God’s resources (Satan cannot create anything out of nothing). The same is true for all creation and creatures. Hell means to live without God’s resources.
Sin (lives without God) ultimately brings death (“wages of sin is death,” Romans 6:23a). None in heaven or on earth or under the earth (cf. Revelation 5:3) can do save us from sin except the Creator. At least one time God was so sorry to create human beings (Genesis 6:6). Before the Creation, He already prepared for in the event of sin committed by us: “For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life” John 3:16 ESV.
Christ birth has only one purpose. Die on the cross in place of us to be glorified after resurrection. No other ways. At the garden of Gethsemane, Jesus prayed painfully, “And going a little farther he fell on his face and prayed, saying, ‘My Father, if it be possible, let this cup pass from me; nevertheless, not as I will, but as you will’” Matthew 26:39 ESV. – T