There's a difference between a swastika, a pair of sowilo runes, a sowilo rune, and a winged odal rune. You also might guess that the jackboots in your example are pretty key. Using context is the key. Having people RP as vikings or varangians and using Norse runes should not have Nazi connotations. Having people roleplay as racist nationalist socialists probably should. In any case, the racism is the bad part, odal is just a letter, you may as well despise Aethelstan for his spelling as decry this AA for using a winged Odal.