Here is Hitler at a Christmas dinner. He didn’t seek to abolish Christmas but to transform it from a Christian holiday to a celebration of the family in a National Socialist context. The job was made easier since the German word for Christmas (Weihnacht) is non-religious in tone. Consequently, a 64-page pamphlet for Advent, released in 1943, for example, has not a single mention of Christ. Mothers were told to hang the calendar up on December 1, and turn one page a day, the final one on Christmas Eve. There are lots of pictures of winter scenes, fables, etc. Have a look here
This intention is made explicit here
This is a couple of years before the war, when the Autobahn workers are being treated to a Christmas dinner.