This is warfare. If the actions of the Russian military deny them all humanity and rights, then that is true of every side in every war. Morality and laws of war mean nothing; they will never apply by that standards. If they only apply to saints, what good are these rules?
What about the US and what they did in Iraq, such as at Abu Ghraib, or during the war on terror? Who meets your standards?
During World War 2, did anyone think about those poor Germans thrown in jails for protesting the war?
I mean, sure, those aren’t the offenders. But because Russia is a terrorist state, targeting civilians instead of opponent’s military, any act against them - anything that hurts Russia - would be morally justified. It’s just a lesser evil.
Then giving out personal information unlimited to that well-defined scope is not justified nor well defended by this argument. You can't have it both ways.
What about the US and what they did in Iraq, such as at Abu Ghraib, or during the war on terror? Who meets your standards?