Is this what they mean by "Putting Christ Back in Christmas"?
http://www.youtube.com/watch?v=uNtBkOXItqw
If the Dec. 25th celebration developed into something that more accurately paralleled the meaning behind His sacrifice?
@Lou C. Ferr:
"Christians DID NOT steal a pagan holiday, they simply incorporated it..."
So in your mind, using something that is another culture's as your own, for your own function, isn't "stealing"? Quite close either way. And similar negative connotations certainly apply when not getting permission and involving dishonest motives.
"Today's Christmas is full of commercialism."
Sure, it's used to promote various kinds of products, not just the Christian product anymore(its various propositions). Does that bother you? And the decorations that you mentioned aren't what makes it commercialized. By the way, Francis of Assisi tacked on the nativity scene thing long after Christmas was about gift giving and spending time with loved ones.