I think you're right. The pendulum swings and the party's stances on issues adjusts to where the pendulum is at each moment. The Republicans have always been the common sense party when the pendulum swings too wide. The Democrats have always been the unvirtuous party taking advantage of the victims of the pendulum when it's at it's widest points, and usually, like you said, in a divisive and even deceitful way. From blacks being victims of Democrats in the mid 1800s to the productive class being victims of Democrats today, The Democratic Party hasn't changed much from when they supported the private ownership of people based on the circumstances of their birth alone.