Even if your worldview doesn't accommodate different ethical frameworks (i.e. I stand behind my own ethical principles, and believe that anyone who disagrees with me is unethical), surely you have to admit that some people will disagree with that stance, will hold their own views that are incompatible with yours, and will call themselves ethical until the cows come home, right?
We're not arguing about whether that's ethical, we're simply pointing out that people like that exist.
You and the parent commenter are no longer arguing about what is and isn't ethical (as you've stated, you both seem to agree), but instead on what to do about the practical reality that society in Russia does see this as ethical, and doesn't give a flying fuck what you or I think.
Now the question becomes, what should we do about that.
> That some countries legalize theft of property in other countries does not change the ethics of this at all.
It literally does. Because those people are participating in a society where their actions are not strictly unethical. Their society does not necessarily view them as sociopaths.
Well I should concede it depends on whether your worldview accommodates different ethical frameworks or not. If you are absolutely ethical then all people must adhere to the same ethical standard and you can rightly justify punishment of outsiders.