perhaps, but as a scuba instructor, I am tired of people saying the underwater sign language for "OK" means white power. Context matters. There still should be some effort to understand the intent of the sender, and not just assume the preconceptions of the receiver are the intent. Somone deciding a word or symbol I have been using for my lifetime suddenly means something else does not change my intent. When a Hindu puts a swastika on their house it clearly does not mean the same thing as when a Nazi does. When a spanish art teacher refers to black paint...etc, etc.. In cases like this, I think we have enough context that the font and details of the symbol are irrelevant. It is clear what his intent is. If the guy did not share those beliefs, given what he does for a living, I would think he would be more careful about using anything that could be mistaken for Nazi symbology.