Relatively speaking it's undeniable that the US has been the most "friendly" "empire" or "super power" in World history. That doesn't mean it's never done anything wrong.
Can you share any research or resources on this topic that have led you to this conclusion?
Could you also just share which previous empire you believe has been more "friendly"?
I don't know how friendly or unfriendly previous empires were, so I'd like to read up more on it, but I honestly don't know what keywords I'd look for. Asking the one who made the claim for references seems like the best way for me to understand their comment better. Why do you expect me to provide arguments counter to theirs?
You want to look out for border regions, the small nations were other empires ended and went back and forth. You look for civil wars (empire lovers VS suppressed), cultural extinction attempts and empire imitators.. Aka small nations behaving atrocious to remain free by mimicry.. Sift through history and you get to know alot of empires that were and are worser.
But that's not what GP was talking about. They said "the US has been the most friendly empire". It doesn't matter if a lot of empires were worse.
This is only true if you live in a handful of North America and West European countries.
It's just true in general, past empires were far more brutal than the US.