I am well aware that the swastika is an ancient symbol; however, its meaning has been permanently changed for anyone in a Western nation. Posturing aside, the "Aztlan" activists are as Western as any other Americans. (Yes, the vast majority of these activists are Natural-born U.S. Citizens. Did you notice that >90% of their signs, tee-shirts, and other trinkets are in English?) It is not a "sun wheel" to them. It is the symbol of the Nazi Party to them. Its use is deliberate.
Or how about the romanticized images of, say, "Sub-Comandante Marcos of Chiapas Mexico fame," meant to evoke passion ... without any real substance.
They don't "own" the swastika/fylfot cross anymore than they own the continent.
In this case, and I'm not talking about the rest of the imagery being used, I'd say you are wrong. THe swastika is the proper orientation (the Nazis reversed it) and it's with some other symbols (like the cross.) I don't think it's meant in the National Socialist way at all, even if there is a lot of leftist or ethnic tribal-socialism being promoted there.