I'm not misinterpreting a thing you said. No, I'm looking at exactly the situation you are describing:
I'm in my house. It's 2am. I see a couple of people in my driveway fucking around under my car.
And you're saying that a valid moral decision is to leave my house with the intention to kill someone?
That is seeing a situation that you know you could leave alone, and choosing to introduce lethal force. That is fucking hunting for conflict to a degree that is absolutely frightening.
You are not saying "I would confront the thieves and bring a weapon in case I am attacked".
You are not even saying "I would use a weapon to threaten them into compliance".
You are saying you would shoot on sight. Instead of de-escalating, you would take the opportunity to ambush and kill. Can you see why some people might call that "hunting"?
I'm sorry you live in a world where the theft of a car part is a life-threatening event. I can see how vigilante justice would make a crazy sort of sense in that situation. However, in a stable society, those actions would be considered a serious crime.
Here people are saying, "Well I can't just let them have this valuable part of my car (that I might not be able to afford to replace). And I'm pretty sure the police aren't going to help me. And I don't think they will stop if I ask them. So I guess I have to shoot"
If you've already judged those people in your head as "hunters", then you're the one who's lost, not them. You have this completely distorted perception of your fellow human perhaps based on the media reporting on 0.0001% of crazy people in the world, and now you believe everyone who lives in texas thinks that way or something.