It seems weird that a theistic person would deliberately teach their
children to worship a false god "for fun", saying that this false god is
all knowing and will bless them every winter if they are "good". Of
course, that's aside from all of the rest of the Norse and Roman
religious connections, and aside from which deity that false god is
representative of. It is very strange to me that one would knowingly
deceive their children like that, especially on a matter of worshiping a being that one knows to not exist.
In regard to the potential assertion that, "we don't observe those
parts of the holiday, we only focus on ____", for what reason should we
seek to "purify" a holiday which is clearly established in paganism while rejecting
and ignoring the actual holidays that God established and commanded to
be forever (Lev 23)?