This video was posted on another site, it discusses the trollkors or trollcross and it being a relatively new symbol (from the early 1990s) and despite that being a valid symbol of Norse paganism.
My question regarding it, is its close appearance to the hate symbols based on the Othala rune should it be used? Or is there enough variation that it is its own symbol?
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).