We know the Ukraine bombed the damn because Russia has been trying as hard as possible not to Provoke nato into hot war and keep it as a proxy war on natos part. That’s why all the ‘escalations’ by Russia turned out to be done by the Ukraine, for example the bombing of Poland, or when Britain boomed the Nord stream pipeline.
No doubt the Ukraine is also the one that bombed its own damn because that is typical of what we have seen of the filthy khokhols throughout the war.
Countries with nukes won't go to war with each other, they'll have economic pissing matches and play rock em sock em robots in developing countries for the spoils, but they will not directly engage each other in warfare, Ukraine finding out the fun way that no matter what Russia does or what the world thinks Russia did, nobody is going to try to kick Russia's ass