> Two wrongs don’t make a right.
I hate this statement with a passion.
Let's ignore the politics of the current situation for a while and look at the first principles of right and wrong.
1) When somebody knowingly and intentionally hurts another person without a valid reason, that's wrong.
2) Now the aggressor is in the wrong and requires punishment (there are multiple purposes to punishment: taking away any advantage gained by the offense, further disadvantaging aggressors, compensation for the victim, retribution, deterrence, etc.).
3) A punishment is just if it's proportional to the offense but only those with sufficient certainty about the extent of the offense, about the offender's identify and his guilt can carry it out. Usually, in western style societies, courts serve this purpose but courts are a legal concept, justice is a moral concept. Morally, the punishment can be carried out by anyone who satisfies the criteria, there's nothing to put one person above another morally.
Legality has multiple tiers: tier 1 is individuals, tier 2 is states. States are a tier 2 institution imposed on tier 1. There is no tier 3 court-like institution which can be imposed on tier 2 entities.[0] Does that mean wrongs by tier 2 entities should go unpunished? No. They often do but there's no moral principles saying that it has to be that way, let along that it should be.
4) Punishment by its nature is the act of intentionally and knowingly hurting another person. But it's not wrong because unlike in point 1), it has a valid reason.
*What some people consider the second wrong is not actually a wrong.*
[0]: You could think of international organizations but they don't have a monopoly on violence above state level and therefore no actual mechanism for enforcement.