Analysis of information sources in references of the Wikipedia article "Christmas in Nazi Germany" in English language version.
For a compilation of Christmas songs, there are indeed exceptionally little references to the biblical nativity story, or Christian elements in general. "Gott" (God) and "Engel" (angel) appear only twice, and are outnumbered by terms like "Stern" (star), "Licht" (light), "Nacht" (night), "Feuer" (fire), "Wald" (woods), etc. Santa Claus is replaced by a pagan "Sunnwendmann" (Solstice man). Instead of Mary, there is "Frau Holle" (Mother Hulda). And there certainly is not a single mention of the Jewish baby named Jesus.