Santa Claus was originally based upon the Christian figure of Saint Nicholas, a patron saint of children, but Santa Claus today has become a wholly secular figure. Some Christians object to Santa because he is secular rather than Christian. Some non-Christians object to Santa because of his Christian roots. There is no denying that Santa Claus has become a powerful cultural symbol which is impossible to ignore, but this doesn't mean that he should simply be accepted without question. There are good reasons to dispense with the tradition.
Read Article: Should Parents Perpetuate the Santa Claus Myth?