I'm not threatening him at all, I'm telling him what the result is going to be. There's no way out of this for anyone. He can do it if he wants. I don't threaten, it's petty. I just want him to know that, as this is our consequence, that is his, because it would be obligatory. I don't like killing characters, I don't like being OP, but I have to act in the realms of my character, as does everyone.
I hate having to do it, but that's simply what would happen. He isn't willing to bend, and so neither am I.