I haven't really studied that period - it's in the 18th century - and I really can't say much about it, but weren't they mostly peasants? It was mostly the nobles and ruling class who had been taking advantage of the reformation in an attempt to extent their own power. Remember, there was a much higher ratio of Protestant nobles than there was of Protestant peasants in the French Wars of Religion (in the 17th century, anyways).

The mostly-peasant participants in the Camisard rebellion were probably real Protestants who died for what they believed in, and not power-hungry nobles.