It is a VERY large violation of the Geneva Conventions to deprive a civilian population of basics for survival.
However, if Russia takes out gas pipelines in Western and / or Central Ukraine, then the Ukies are justified in taking out gas pipelines in far Eastern Ukraine and anywhere in Russia, at whatever range the Ukies can hit them: That presently is at least 1000 km by drone, 700 km with the Peklo cruise missile, and unlimited km by sabotage.
You might try thinking before chest thumping, but that seems to be impossible for you.
Paul, you didn’t complain over NATO tactics in former Yugoslavia so don’t whine when Russia does the same thing.
NATO pre-emptively stuck all power grid infrastructure in every conflict since Clinton misused NATO. Every country NATO attacked lost it all in the opening states.
As for the pipe lines, they were paid for and built by the Russian oil company - they simply transit Ukraine.
Zelinski thought he was slick playing off Russian oil/NG but Russia has found new markets which simply ship it EUrope after a middleman in Turkery, India or elsewhere.
Taking out the oil pipe lines is not depriving Ukraine of anything except the fuel they SKIMMED at a reported 50% rate transiting to EUrope.
Zelinski and Biden are playing checkers - Lavrov is playing 4D chess.
You Biden Warmonging piker.