Hmm.. reversing the insignia might be tolerable.
In reverse, which is really the original symbol used in Indo-Aryan/Far Eastern cultures, it becomes the swastika of the sun. It stands for "sun" "brightness" "fullness" "life" "yang" and etc etc.
The insignia affiliated with the Nazi party is the swastika of the moon, standing for "moon" "darkness" "emptiness" "death" yin" and etc etc.
The blue swastika of the moon of the Finns, while same in shape, are of different color and recognized as von Rosen's cross, in a different context.
If people can concur that the "original" swastika(swastika of the sun) used on the tails of German planes are there for pure visual representation only, and is totally out of context from Nazi political agenda, I think it might be acceptable - it even looks different.