Well, if that's the case, then it sounds more like some sort of ... psychedelic break. It's been abused to the point of delusion, and you're right, there's no judging it by even the maddest elf I've known.

I dunno whether it's better or worse, though, that it sees Harry as a force for good. On the one hand it means it'd prefer for Harry to participate in whatever deranged vision it has of defeating Voldemort; on the other, I don't think much of anyone who threatens Harry, no matter what the perceived provocation! And if Harry doesn't acquiesce to the creature's wishes, if indeed we could even interpret how he is supposed to perform to expectations, well, the elf may come completely unhinged. How do we stop that kind of force?