Do you think there are aliens?

[Viking]

Maybe an advanced alien society would be so advanced as to abhor war, but maybe by the same token they would be so advanced as to consider us insignificant. Removing a few humans to make way for themselves might be no more abhorrent to them than clearing a grassy hill to build a house is to humans.

The funny question is what "advanced" is supposed to mean. If you let it mean more than technology, then there is the eternal question of what can be considered "wrong" and what can be considered "right". Maybe some alien race is more like Hitler, thinking that war is an act of "cleansing", and furthermore not at all keen on what would have been their version of 'humanism'. Maybe they would be willing to use the science of genetics to actively contribute to their own evolution and create and improve traits that they find ideal.

Anyway, what I wanted to say is that I see no reason why the idea that "advanced = peaceful" should hold universally; though you do yourself point out how the act of being peaceful can be hugely relative. They do though perhaps not have to consider us insignificant/stupid; the fact that we are of another specie could mean that the idea of peace wouldn't count any longer - perhaps they could be wired that way.