And it came to pass in those days that there went out a decree from Caesar Augustus that all the world should be taxed.
The rest of that chapter tells of the Birth of Christ in Bethlehem. The rest of that book tells about Jesus Christ's ministry and His death on a cross to bring the gift of salvation to the world.
But if you leave out that part...
If you forget the Christ part of Christmas...
The world only gets Taxed.
And all went to be taxed, every one into his own city.
That is so not "Joy to the World." Thank goodness the story doesn't end there.