The reason Winterfell was conquered and its owners killed or scattered is because they were absolutely dedicated to playing the game of thrones but also very dedicated to playing it badly.
They were aristocrats through and through. Their support for the common people, though often expressed, was completely disingenuous; their sole concern was power and the maintenance thereof. However, the support of the common people is a substantial asset in maintaining power, and their main skill was convincing those common people that their greedy violent aristocrats were somehow "better" than anyone else's greedy violent aristocrats. Leveraging that popularity could have kept them supplied with wealth and power for thousands of years, but they threw that away in support of an incompetent failure simply because it was their "turn" to have power. Starting a war and screwing over the common people economically because of their aristocratic notions of whose "turn" it was to take power didn't end well for any of them and they have only themselves to blame.
This is not a commentary on any recent American elections. Why would you think it was?
PS— Congratulations America for making Brexit not the dumbest electoral decision to happen in 2016!