I'm wondering why Imperius really hates the Nephalem in the Act 4 of Diablo 3… He even goes up to wanting to kill you right before the final boss.
I don't see why. I come to save the whole of creation, him along with it, and ending a war that has started at the beginning of times… That would make my day, any day, for me.
So why does he want to kill the savior of everything?
Best Answer
I presumed it was simply because he voted on the "destroy humanity" side of the original debate. I'd also guess that this was at least partly because the nephalem have the potential to be "greater than both" the angels and demons, threatening his power.
I don't have anything to back this up, though - just my own take on the situation.
As Raven Dreamer points out, there's also the immediate fact that he blames you for Diablo's resurrecterific rampage through the High Heavens, which is probably plenty to annoy him on its own.