Please note the comment .."he knows how to live in peace with other animals." I'm willing to bet this is one of those radical animal rights people who think that stepping on a cockroach is cruelty. They engage in serious anthropomorphism.

I have to ask the question how does he know whether the cat knows how to live in peace or not? Did kitty tell him this late one night?

This individual failed in his/her responsibility to the hamster and the cat and -- in a continuation of his practice of imposing human abilities on animals -- thinks the cat can rationalize.

I agree with what everyone else said. You were right to blast the person. I wish I thought it would make a difference.