Every once in a while, I find "leftists" or "anarchists" who discount ableism, i.e. the oppression experienced by disabled people specifically because they are disabled. A most common example is when leftists use ableist language (e.g. the R-word) to insult enemies (instead of insulting them for the thing that they are, e.g. reactionary, ignorant, unserious, monstrous, capitalist, etc.). Class reductionism is another common way that leftists discount ableism. Class amplifies ableist oppression for sure, but winning the class war would be insufficient (but necessary!) to abolish ableist oppression.

Usually anarchists and other leftists are pretty good on ableism, but not always.