I recently watched videos of Bernie Sanders, who americans call left-wing, and maybe compared to other american politicians he is, but compared to russian opposition he is very like Boris Nemtsov and Alexey Navalny. First is literal founder of Union of Right Forces, second is considered to be center-right.
Americans are deeply awash in right wing propaganda and silly little founding mythologies. It also killed or blacklisted its left several times.
American political education is that being left means being a conservative liberal that is okay with the gays and being right is being, more or less, a “respectable” civil Nazi, and everything else is vague extremism.