There is no “C’tians for Moses” organization by that name, but those C’tian groups that keep Sabbath, the Festivals & Kosher, as well as C’tian Reconstructionists could well fit the designation- and the vast majority of doctrinally-conservative C’tians still have some regard for the Law of Moses.
I have two thoughts on this.
The first is that a business calling its most busiest period “the Holidays” rather than “Christmas” is simply broadening its target from only (or mainly) those who celebrate Christmas to include everyone, therefore maximising profit potential. This seems to me to be the epitome of the American way, and that anyone who objects to it is being unpatriotic and unAmerican.
The second is that Christmas is the celebration of the birth of Jesus Christ, who I understand had very definite Views about the pursuit of riches, and particularly those who made a profit from religion. I would have thought that those who took their Christianity seriously would approve of the separation of the profit motive from a major religious holiday.
I can only speak for my own Christian upbringing, of course, but I’d heard plenty about Moses by the time I turned ten or so, and he was right up there alongside the other OT prophets, or even out in front a little, as a figure to venerate for having been especially in touch with God. Why not?