Yep, dam blowing is not new, it is just something that is considered a war crime by the Geneva convention. But I guess that if you are ok doing it, it is ok for others to use it at their own convenience.
I don’t understand why you continue to pedal this issue with the dam with persistence worthy of a better use, when Ukraine in a rather rude form refused to Turkey to conduct an independent investigation into this incident, and Zelensky admitted that he had no evidence of Russia’s involvement in this. As long as all available evidence indicates that this is the work of Ukraine, and there is nothing at all against Russia, except for empty allegations, do not forget about it.