Having a living thing killed because it did something you don't like, that it doesn't understand is wrong, is so incredibly heartless. Pets aren't toys meant to be tossed when you get tired of them, they're living creatures deserving of a good life.
Now if it was peeing everywhere because of a terminal medical issue causing it pain, that's a bit of a different story. I don't know the situation he and the cat were in. But if it is just as the parent comment says, why kill the thing instead of giving it up for a chance at a better life?
Having an animal killed for no good reason, other than it caused you problems, is a bit twisted. In situations like this, rehoming them is the ethical thing to do.
This is literally saying 'I don´t care if he´s killing kittens'.
I enjoyed my meatballs today, btw!I'm joking in the sense I didn't eat meatballs today, but we kill animals all the time. That's what humans do. Do you eat meat or foods cooked with animal fats?
I think you get my point.
A life is a life. I don't see why pets are somehow more important than other animals.