Keene NH is predominantly white, but it also has a strong “Occupy” crowd and drug legalization contingent. They were a big problem earlier in the year with groups constantly drawing political chalk drawings in the town square that were considered pretty aggressive and hostile at times, even marking up historical landmarks. Town members were upset at the way it was impacting business and tourism and were trying to get an ordinance in place to regulate chalk graffiti. These might be some of the same troublemakers.
Those are the “Free Staters” who have invaded Keene. Militant Libertarians.