On the evolutionary basis, you may be inhumane, or you may be absurdly humane, but you cannot be human. That you and a tiger are one may be a reason for being tender to a tiger. Or it may be a reason for being as cruel as the tiger. It is one way to train the tiger to imitate you; it is a shorter way to imitate the tiger. But, in neither case, does evolution tell you how to treat a tiger reasonably, that is, to admire his stripes while avoiding his claws?