Certainly no justification for Russia enacting war and doing a multitude of war crimes. Putin's intentions are certainly imperialist and not humanitarian.
“The failure to stop abuses and possible war crimes by volunteer battalions risks significantly aggravating tensions in the east of the country and undermining the proclaimed intentions of the new Ukrainian authorities to strengthen and uphold the rule of law more broadly.”
I absolutely agree with this. I don't know the full context of the conflict in 2014 with the annexation of Crimea, but no human rights abuses should be ignored and the people responsible need to be held accountable.