I try to practice compassion for all sentient beings, so I get your point. But not all sentient beings are capable of responding to love, so I think we social animals need to be careful in projecting. Indeed, I suspect there are mechanisms in predators that actively suppress the response to love. However much the cow loves the farmer, the cow will still get slaughtered and eaten.
Being "nice" or "compassionate" to others does not require martyrdom to those who don't (or physiologically/neurologically cannot) respect boundaries and don't return the same kindness.
