One other thing that isn't mentioned much is the element of Cuban Americans shaping the right wing. Not just Cruz and Rubio, but Cardenas (who's heading CPAC). These guys take extreme views because they or their families had to encounter the extreme left. Their politics are shaped by trauma. In my opinion, trauma, while useful for revolt, is a shitty platform for the longterm. They need more rational Republicans. Not emotional ones. Or the ideologically "pure".
It's the same shit with Ayn Rand. Her family fled the Soviets. That warped her mind enough to advocate extreme self-interest.