Politics is about twisting logic and facts to fit a pre-set narrative.
The simple reality is, that people are being hurt and killed. These are civilians that just want to live, take care of their families and their selves, and contribute to society. These people have not instigated this war nor are they playing an active role in this war.
To justify an invasion, kill civilians, and flatten residential buildings, schools, and hospitals is an extreme level of evil and has no justification in a civilized society.
Russia started this, they need to eat the consequences that come along with their actions.
Putin may believe that killing so many people, including young Russian soldiers is justified as long as his objectives are met. The world does not have to subscribe to that belief.