Where did we get the traditions & customs of Christmas from?

Just where did we get the following from
1)decorating and worshiping Christmas trees for the promise of the return of spring.
2)Santa Clause
3)Exchanging of Christmas presents.
4)Mistletoe and holly and ivy.
does anyone think baby Jesus would approve of Christmas customs.
by worshiping trees I mean the evergreen tree is the one tree that has green leaves all year long,even in the Winter and Autumn,the evergreen symbolizes,sex,life,fertility and the promise of life that will return in the Spring.(when all the snow melts.

I don’t think we worship Christmas trees. What does a dead tree have to do with the promise of spring? Christmas has nothing to do with spring.
Many traditions are from Germany. Santa Claus is rather universal, but with different names. Giving gifts is what the Wise Men did when they saw Jesus. Mistletoe and holly and ivy are not necessarily Christmas, but when greens were brought indoors to decorate the house, holly and ivy would last along with evergreens.
I don’t think Jesus would be happy with the way we celebrate Christmas, forgetting Him completely and worrying more about the great sales on Black Friday.
I don’t think he wants us to worship our Christmas tree either.