Lets pretend the whole world confirmed it...now what? Seems like either a) it really happened or b) the whole world is crazy.
If a) what do you do next?
Given the whole world confirmed it, thus the entire world would believe in God, I believe most people would then think "well God exists and as an ultimate divine being he is most likely right, better do what he says". So I would do as god asked me in that specific incidence. Anyone who disagrees cmon, youre really going to contradict an omnipotent omnipresent being?
Actually, yes. Omnipotent doesn't mean free from moral obligation. Killing everyone is abhorrent and wrong, regardless of who requests it.
Sartre best described the situation in 'The Wall.' Basically, the only true inalienable human power is the power to say 'NO!,' even in the face of an omnipotent oppressor.
IMHO, our postulated God's omnipotence is in fact even more reason to oppose hir, to my own detriment if necessary. An omnipotent God can do hir own damned dirty work.
I suppose I didn't use the right collection of words. At least as I understand god, he is not only all powerful, but also all knowing, all loving, and when he does interfere with the human world it is for the betterment of the entire world and humans as a species. If he is asking this of me, he must have a good reason.
Comparatively, if a (without a doubt, agreed upon by all humanity) All knowing, All powerful, loving alien species asked me to nuke the planet and I was convinced that they must have a good reason (as I would in the case of God), I would do it. It isn't, in this case, the fact that God is asking me but rather someone with all the components of God that I would need to convince me.
It would, in both cases, require everyone in the world to be in 100% agreement that God/Super aliens were exactly as they claimed; omnipotent, omnipresent, all knowing, loving.
I would also like to say that to me murder for the greater good is morally acceptable to me. While what is the "greater good" may be debateable, I think in these circumstances that I would think it is the greatest good, though I could not be certain until it actually happened.