I can understand your worry and annoyance, but they will forget about it eventually.
I hope this may be some small consolation:
I worked in an army surplus shop in the middle of a Brighton, UK (a VERY PC place) during the 1990s when the Swiss Army sold off their stocks of 'Minnestrone' Camo gear. Worried about possible adverse reaction, I put a notice up saying that it was similar to ww2 German Camo (Liebermuster).
Next thing I know, the boss recieved written letters of complaint saying I was promoting nazism and we had a (tiny) group of protestors outside who would not talk a calm and reasoned expalantion over their own wild imaginings.
Like at school, it wasn't easy to hide from the fools and bullies- they knew where I worked....
In the end they gave up and fogot about it, some even came back and bought stuff.
The only time we ever got serious agro was for selling Russian rabbit FUR hats... that cost us two shop windows!