To be 'for animals' is not to be 'against humanity.' To require others to treat animals justly, as their rights require, is not to ask for anything more nor less in their case than in the case of any human to whom just treatment is due. The animal rights movement is a part of, not opposed to, the human rights movement. Attempts to dismiss it as anti human are mere rhetoric.
The Case for Animal Rights (ed. Univ of California Press, 1985) - ISBN: 9780520054608