My general view on counterfactuals and morality is that it's generally possible to come up with some elaborate fantastical or science-fictional or just wildly implausible hypothetical scenario where X is justified, for all X. And the correct response to those hypotheticals is that yes, in those hypothetical situations, X would be justified.

But this is generally not a very useful thing to do at all. It's not a useful way to spend your time. Because those wild hypothetical scenarios don't really have any bearing on the real world, so it's basically a meaningless exercise, and it's generally fucking weird and harmful to obsess too much about weird alternate universes where despicable things could actually be moral.