Orca are dangerous wild animals. In the wild, they are top predators that hunt co-operatively like wolves. this particular orca probably wouldn't survive if they released it to the wild. It might not be able to learn to hunt. Or the other whales might gang up on it and kill it. Dolphins sometimes gang up on others and kill them by beaching them. It might be kinder to put the thing down. But then, what would you do with the body? Donate it as meat for tigers at a predator sanctuary maybe. that's what we did with our favorite boar when he got too old and sick and had to be put down.
I hope they didn't mean "stoning" literally. How is that supposed to work? Wouldn't the rocks just sink? Wouldn't they just bounce off and tick the whale off? And do these people use ANYTHING in the news to further their own agenda? what a bunch of weirdos.