I would express it other way. Right wing dictatorships get support in middle class, while left wing dictatorships get support in working class. Middle class is better educated and more loving of order, so it's easier to structure society and even transitioning to a democracy. We did it in Spain forty years ago. Working class dictatorships need more propaganda, distrust elites (except the very people in politic power) and change, so the paranoia is much bigger.