Sorry, but I'm going to fall on the side of the law abiding citizen here.

If you can't know the intent (and you can't), then you must assume the worst intent and act accordingly. Anything else is naive.

Because I promise you one thing, I look up and see a stranger in my house, I'm attacking them immediately with no thought towards anything except protecting myself and everyone in the house. There will be no questions until it's over with.

If they were just looking to steal something for drugs, that can be sorted out once I've subdued them.