it's called leftwing and rightwing because it has to do with traditional hierarchical power structures separating most people from having power. royalty, nobility, aristocracy, old men etc, interests are rightwing. nazis fall under that because racial hierarchy is a consolidation of power along racial lines and they removed power from people and workers, killed unions, and gave up the public sector and gave it up to the economic elite. lefties get criticized for "progressive stack" like disorganization because leftwing politics take more demographics into consideration. that diversity, lack of cohesion, is from moving away from more clear forms of rightwing hierarchy. communism as an economic policy is more leftwing, but communist russia is like the democratic north korea; you can call it what you want, but it doesn't change what it is.
United States