Consider the fate of the pagan religions.
Catholics overran pagan cities, towns and lands, bought and occupied pagan buildings and temples, altered pagan art, music and literature, absorbed and replaced pagan harvest festivals and religious feasts, and, above all, won over and converted the pagan people themselves. In doing so, Catholics brought all things under the dominion of the one true God, Jesus Christ.
Isn’t that what He wanted us to do (cf. Mt 28:19)?
Scripture sanctions this practice. The Jewish Feast of Tabernacles was on the same day as a Canaanite vintage festival that it supplanted, much as Christmas coincided with the festival of Sol Invictus that non-Christians were celebrating.
This is the same principle that Protestant churches use today when they replace the celebration of Halloween with “Reformation Day” or “harvest festival” celebrations. It is an attempt to provide a wholesome alternative celebration to a popular but unwholesome one.
Anti-Catholics who accuse Christmas of having “pagan origins” fail to recognize that it is precisely anti-pagan in origin.