People fail to understand Christmas because they fail to connect the cradle of Christ with His death and resurrection.
The mothers laughed, incredulous at God's grace in bringing life to the barren.
The Good Shepherd
Christ not only redeems us, but He continues to act creatively in His world governing all things down to the details.
Unwrapping the Meaning of Christmas
We cannot have some romantic message of peace and goodwill by isolating the story of Christ's birth from the rest of God's message to us.