So much for people thinking sheep are defenseless.

The BBC story says that the main injury, possibly the only one, was from being gored in the leg. Evidently it caught a major vessel. If someone had known to, and had enough on the ball to think to do it, a tourniquet might have kept him from bleeding out.

A male goat being territorial is entirely natural. Butting heads is just what they do to solve territorial disputes. Evidently the guy advanced attempting to shoo the goat away and 'protect his family'. Which is what you say when you really should have stepped off gracefully and in good time. The time to back off was when the the goat initially looked square at them and bowed up.

Manning up and facing off only works if the the goat doesn't call your bluff. Stepping up and facing off was goat behavior for 'I accept your challenge'. Male goats face off and ram each other as a way of life. Those goats can come in at 300 pounds and they are tough and strong. As befits an animal that runs up mountains as a way of life. Can't blame the goat because the ape descendant didn't know how to play the butt-heads game and got his leg in the way.

No, I don't think the Park Service did anything wrong. You can't cure stupid and asking them to Nurf the wilderness for you is silly. Wild animals are, by definition, wild and they have minds of their own and are potentially dangerous. A shame they had to shoot the goat. Sounds like the goat was just doing what goats do.