I can't answer your question but can say why the heck should it matter. Why don't we go after putin who we know has been bad for the globe for a very long time or what about netanyahoo and heck the kims. We may have done some shady things in the past but they at least followed international law (it might be debatable but not obviously ignoring it like this) or at least did it covertly because we still had some recognition it was wrong.