If you think we should stop celebrating Christmas just because it has pagan roots, consider the following.
The music you listen to, the way your calendar and clock measures time, the names you use to refer to various planets in the universe, etc., all have ties to pagan religion. If you think just because something has pagan roots, that Christians shouldn’t participate in it, you would have to give up your calendar, all of your music, and much of our astrological termonology, and lots of other things you take for granted and your common sense judges to be permissible. Originally, there were probably all sorts of pagan ideas strongly associated with the way we measure time on our clander, but that doesn’t mean a Christian who uses such “origianlly pagan” systems is somehow participating in pagan religious practices. Originally, much of our musical tastes had ties in all sorts of pagan celebrations, but that doesn’t mean that musical instruments and styles of celebration should be “off limits” for Christians who use music to worship God. Don’t forget that Yahweh commanded the Jews to adapt pagan music to worship Him in the Old Testament. The Jews didn’t start from scratch in their attempts to worship God, they adopted much of the pagan forms of worship to Judaism.
Where do you think celebrating birthday’s originated? It’s not in the Bible. So I guess it’s pagan too? What about basketball? Should Christians particiapte in sports celebrations? It’s pagan.
Why not rather give thanks to God that whatever celebration the pagan culture had going on before it evolved into a Christ-centered celebration in the West (notwithstanding the current cultural changes), Christians sort-of “high-jacked” the celebration and conformed it to a Christ-centered worldview and lifestyle.