That's not really true. When someone self-identifies as a "Leftist", it's actually not (usually) being used to describe opposition the right, but to place thems

That's not really true. When someone self-identifies as a "Leftist", it's actually not (usually) being used to describe opposition the right, but to place themselves on the left as being further left than liberalism (i.e. identifying with Marxism, socialism, communism, anarchism, etc).