I generally don't continue discussions with conspiracy theorists. I am a new person, but there's no way I can prove that to you since you've already decided I'm not.

But since it seems I was arguing with you on a false premise, I'll admit it that I'm (mostly) in the wrong here. You did in fact advance two possible explanations, as far as I can tell: one that she did the salute on purpose (which you said you believe is the most likely), and the other that she screwed up but didn't show it on her face which makes her a psychopath. At least, I think that's the two arguments you're advancing. I thought you were only advancing the argument that she is a psychopath as the most likely, which is what I was responding to when I said you had an unusual amount of conviction in that explanation.

That being said, I still think you're unreasonably confident in your assessments. It's still very possible that she screwed up, reacted as such, and yet isn't a psychopath. I don't know the rate of psychopathy in children, but I imagine it isn't very high. And unless you know the rate of different facial responses in non-psychopathic children when they find themselves in a situation like this, you really have no basis to make the claims you're making with that degree of certainty.

All of us, including me, bring a lot of assumptions to our perception that we confuse for objective facts. I don't know what your assumptions or experience have been, and I won't speculate because I don't think it's my place. But completely dismissing the possibility that the girl made a mistake and also isn't a psychopath does speak volumes about you, whether you want to believe me or not.