If we are the kind of people who would delete lots of AIs, I don't see why AIs would not see it as similarly ethical to delete lots of us.

So just in case we are a simulated AI's simulation of its creators, we should not simulate an AI in a way it might not like? That's 3 levels of a very specific simulation hypothesis. Is there some property of our universe that suggests to you that this particular scenario is likely? For the purpose of seriously considering the simulation hypothesis and how to respond to it, we should make as few assumptions as possible.

More to the point, I think you are suggesting that the AI will have human-like morality, like taking moral cues from others, or responding to actions in a tit-for-tat manner. This is unlikely, unless we specifically program it to do so, or it thinks that is the best way to leverage our cooperation.