Christmas originate from pagan feasts..

It is known that Christmas originate from pagan feasts that were only given a Christian meaning some centuries after Jesus lived on the earth.

How much these feasts were a worship of Sun or of any other idol, and how much these were just for having fun and feast itself?

As Paul writes the idols are nothing and eating (sacrificed) meat in itself is no problem. Only we should not be a stumbling block for weak brothers who may not have that recognition.
If nowadays, at least in the western countries, Christmas have lost their inner connection to idol worship, it shouldn't be a problem to follow some Christmas traditions of pagan origin, that are not bad in itself? Of cause we should be aware of not worshiping the consumption-idol, but this is valid all the year around not just the Christmas-time.

But the majority just likes the traditions and flows with the stream.. So can we take part in it in a moderate and Christ-centered way or is it that evil and pagan, that true Christians, followers of Christ, should reject the Christmas completely?
Anyway I think Christmas and other feasts are not neccesary, we can have a feast for the Lord in our heart every day.