So in your mind, when someone is referred to as a Nazi, the mental image that most people immediately come up with is asking the candidates to sign a non-binding "pledge" in order for them to be considered for an endorsement or political support in a primary election?
That's interesting, most people tend to think of things like fascism, total government, and maybe eugenics. In fact, your association is even more outrageous when you consider that the "pledge" Vander Plaats asked candidates to sign is fundamentally and philosophically different from something a Nazi would have endorsed. It speaks of concepts associated with limited government, not the national socialism associated with the Nazis.