You're probably be right, but not all Dakotans are like that. My mother's family, which is mostly Irish Catholic and Swedish protestant (there's a mix for ya!) loved to argue. My grandfather, the Swede, would take the opposite side of what he really believed just for the sake of starting an argument.
My father's family and my wife's family are the exact opposite. They'd rather suffer in silence than rock the boat. Unfortunately, for my wife, her husband and two kids got my mother's genes.