Yeah it was originally celebrating the sun or something like that I think.. I looked into it a while back I can't remember exactly what I learned but it made me reconsider Christmas. I think it should be fine for people to gather with their families and be grateful for God's gift to humanity. It's just that the holiday itself was completely made up by people like us, never was mentioned in Scripture. And there's a lot of greed and envy surrounding it nowadays. And like you said people are attached to the idea and I understand why but they really shouldn't put these types of things before God and the Bible.