:obama-drone: is the best answer here, for a few reasons.

People talk about Obama breaking chuds' brains, and that's exactly what happened -- the very existence of a popular, charismatic, highly-educated black president was one of the biggest imaginable contradictions to white supremacy, whether conscious or unconscious. His victory was so overwhelming that you had overconfident libs talking about "permanent majorities" in Congress, and the looming shift away from a white-majority voting base made that as plausible as it could ever be. Further, the fact that the neocons couldn't stop Obama (and the disastrous end the the Bush administration more generally) meant that they could no longer be trusted to maintain existing power structures or deliver any of the associated benefits to their base.

So the right needed a new strategy, which led to a bunch of novel right-wing experiments, including the alt-right.