Sorry, I thought it was common knowledge since the 90's [1] and kind of obvious being that they often use the valknut, Thor's hammer and Tyr's rune for their logos. There's nothing hand-wavy about it though. It's huge in current fascist movements, you won't have to look too hard.
1. https://en.wikipedia.org/wiki/Heathenry_(new_religious_movem...