This is a preposterous poll. The fact that more Americans think it should be about Jesus than Santa, who represents materialism at its core, is not an endorsement of the Christian conception of Christmas. If you polled the question, "Which should Christmas be more about, Jesus or peace and love for all mankind?" then I'm sure you would get just about the same stat in the opposite direction.
But don't tell the right. They love to cite polls that fit their narrative. It's like the way Fox gets its news these days. Just poll Republicans, and whatever they think becomes the "truth."