It was also a very common symbol for Arizona and New Mexico indians. I've got a 1922 map of AZ and NM, and the decorative border is made of swastikas. An antique indian rug I saw once had prominent swastikas.
The "sun symbol", whatever you call it, for the state of NM is basically a replacement for the swastika.
Someday maybe the indians can reclaim it, and we'll finish putting the Nazi's in the dustbin of history.
A few years ago here in Central California they tore down a building that revealed the side of the building it was right next to. On the side of the other building was a big swastika that had been painted on it in the 1910s or 1920s (pre-Nazi). Some people wanted it painted over and some wanted it saved because it was historical. Don't remember how it turned out.