We have been through this. It was not a swastika. It was the tattoo favored by concentration camp guards (and progressive senatorial candidates, apparently).
From what I can gather, it was once a favored warning by makers of poisons too. But kids mistook it for pirate's symbolism so they stopped using it.
The Nazi concentration camp guard thing must be pretty obscure. I had never heard of it, and I know damn near everything.
Most people know about the Swastika, but not the clockwise / counter clockwise distinction..
I would give him the benefit of the doubt and focus on issues.