In any case, Putin's case is that the Ukraine invasion was justified because of the actions of NATO. Well, then, take it up with NATO, not hapless Ukraine who did nothing wrong, and who you knew wasn't in a position to defend itself. Just a typical bullying stance. It's all NATO's fault, so well invade Ukraine! The truth is, he wanted to invade and found what appears to be a convenient excuse: NATO expansion east, and the Maidan "revolution". Both are based on fundamental lies.
https://www.nato.int/cps/en/natohq/115204.htm