You don't take over a country that has a functioning military by terrorizing civilians. You have to defeat the military.
Russia is knocking out the electricity for innocent civilians because they can't knock out the Ukrainian military and have been losing ground since the end of Summer.
There are many countries which has suffered the the power imposed on them by either USA and USSR
Afghanistan is one such country - to gain land and to have an access of the hot water oceans both the countries have destroyed the land with their brutality
There is no moral justification for the US to stick its nose into Russian and Ukrainian affairs
Sure there is.
Ukraine and US are allies and an agreement was made in 1991 that included US military support for Ukraine. It's also in US best interest as more democracies and fewer autocracies are always good for American/andy western countries National Security.
It's also in the best interest of the world to prevent a mad man from invading countries without consequence. We learned that lesson in the 1940s after the world looked the other way in 1939 while Germany annexed Poland.
The USA stick its nose in every country affair - recently there was a big protest happened and is still going on in Pakistan for US sending cyper to change Pakistani PM and that resulted in unrest in the whole region USA twenty year war has brought so much destruction in Afghanistan and the region and now they want Russia to have peace with Ukraine
The US has done some awful indefensible things in the past. Helping Ukraine is not one of them. If you're defending Putins actions today you might as well defend George W Bush's actions in 2001. Criticizing the fucked up US history to defend Putin is not logical.