Firstly,
Christmas is officially only a festival celebrating the birth of
CHRIST, as the name suggests, CHRISTmas, is already obvious its
intent. The cross-cultural traits of our country have made the
occasion merge with others in a certain extent. almost similar to
deepavali and hariraya "merged". But in other countries it is quite
recognised as a christian festival.
Secondly,
Santa Claus is not a figment on imagination, but it has been
metamorphed to such a twisted way that it seems it is
fantasy.
Santa is actually Saint Nicholas, a Bishop that in a german
folktale fought against a demon, in celebration he gave out
presents and told the story of the gospel, and thus its relations
with the christianity.
Lastly,
the chinese god of fortune hat is just some cheapo advertisement to
save money on CNY celebrations... they just take off the seasons
greetings and switch it to something else...