The Secularization of Christmas

I have heard many arguments that Christ should be put back in Christmas and so on. On one hand, I agree. If we are going to call it Christmas and consider it a Christian holiday, then perhaps they are right. But on the other hand, the only reason we have "Christmas" is because of a similarly timed ancient pagan holiday. We commandeered the holiday of a different religion and tried to make it into something of our own. Sure we have tried to put it to good use, but I don't think we can entirely blame non-Christians (and Christians) for secularizing an originally pagan holiday.