Abolitionists reject all forms of human discrimination, including racism, sexism, heterosexism, ageism, ableism, and classism—just as they reject speciesism.
The Abolitionist Approach to Animal Rights rejects speciesism because, like racism, sexism, heterosexism, and other forms of human discrimination, it uses a morally irrelevant criterion (species) to discount and devalue the interests of sentient beings. But any opposition to speciesism makes sense only as part of a general opposition to all forms of discrimination. That is, we cannot oppose speciesism but claim that, as animal advocates, we do not have a position on these other forms of discrimination. We cannot say that we reject species as a morally objectionable criterion to discount or devalue the interests of nonhumans but that we do not have a position on whether race, sex, or sexual orientation/preference are morally objectionable criteria when used to discount or devalue human interests. Our opposition to speciesism requires that we oppose all discrimination.