You are absolutely right. In this case the nudists are either completely self-sufficient in their own town or the rest of society is sufficiently tolerant of the concept that they will still trade with nudiststown. If the rest of society viewed nudism the same way they viewed violence, then they would cut all economic ties with nudist town.
To properly understand my article you must free yourself from judgements regarding the particular behaviors I used. You must allow for complete freedom of "public opinion" which means that public opinion could turn against anything.
In reality, they either work online, find employment in nearby towns, or get dressed to go to work like the rest of us.
Also many nudists wear clothing especially when it gets cold. The key thing is respecting someone's right to wear whatever the heck they want too since it's their body.
I have seen public opinion turn radically against someone advocating non-violence. This is virtually certain to occur in mob situations where individuals succumb to mass psychosis and come under the sway of intense negative emotion.
I avoid sporting events like the plague.