Since the Nazis were all about casting out Christianity and embracing the old gods, you'd think that German-speaking socialists of the 1930s would be cool with nasty old Krampus. But not so, according to a Dec. 23, 1934 New York Times article headlined "Krampus Disliked in Fascist Austria."
Now remember, Nazi Germany didn't roll up Austria till 1938. Austrofascism was the rule of the day and, unlike the Nazis, they were heavily Catholic.
According to the NYT article, the Austrian government outlawed Krampus entirely -- who, according to the article, had virtually usurped the role of prime gift giver from Santa at the time. It was the demon, not the old man, who mad the rounds with sweets and gifts.