The winged othala rune specifically was created by the Nazis. The historical othala does not have the wings on it. There are certain symbols that are too far gone to really be reclaimed any time soon. The regular Othala is fine, but does carry the risk that uneducated people will see it as the Nazi symbol.
The Mjölnir symbol is fine, along with to some extent the Valknut (although the significance of that symbol, historically speaking, is questionable).