Maybe for some big names, but for regular shows/gun sites/militaria dealers, there are simply too many for them to bitch to. I sold a ton of German militaria to a dealer here (bayonets, uniforms, gun parts, Flak fuse crates, etc) and he enthusiastically bought all of it without a second thought - because it sells - the next time I went there, all of the stuff I sold him was already resold. I've also sold him American and Korean militaria - we don't discriminate, it's all militaria to us. The dealer is a guy whose father was in the 101st Airborne in WW2 so hardly a Nazi fan himself.
People like her are unable to understand that not every person evaluates the moral justness of every cause or battle ever fought in dealing with the wares and personalities of the players. This goes for wikipedia or militaria dealers. I don't make a 'moral' choice about the cause of the Roman Empire simply because I have a few Roman coins on my want list for my collection.