I no longer have any idea what point you're trying to make, and we're veering into deep philosophical territory here, but:
That would most likely be your own fault since the argument has veered entirely on disproving the points you've made to defend your conclusions. I'm still on my original point. You're going through a series of ad hocs to defend against it.
1) A godawfully bad book called The Shiva Option provides a case of complete intentional genocide that I imagine you could get behind 100%;
A: You're wrong.
B: Personal attacks, even implied, do you no credit.
2) you're wrong; there are no moral absolutes that exist independent from the viewer. Physics contains no morality and in the absence of a viewer the universe is simply physics.
Morality does not exist outside you. Let us conduct an experiment on this subject, shall we? Go kill your neighbor.
You are arrested and imprisoned. Morality does exist outside you. Now, you'll argue if we wipe out humanity, morality will not exist outside humanity, but it clearly does inside social animals. If we wipe out the social animals (or even all life), more will eventually evolve because physics allows for that to happen and anything not expressly forbidden will eventually. And they will hold similar conceptions of morality because they are advantageous to the species. (Unless you can devise some means for them to hold completely different ones which are advantageous to the species; I think getting around the "not killing each other at random" bit will be hard.)
So no, perhaps it's not physics, but it is biology. It's not about observation at all.