Give it a rest. Nothing is obvious. Who was really committing the crimes in Mariupol must be investigated, because there were both Russian DPRs and Ukrainian Azovs who are suspect there. But nothing is obvious here. There’s a boundary between guarded skepticism and cynicism, and you’ve crossed it into Putin narrative-land.
There’s plenty of video evidence of the out of control extremists in the UA who have been allowed to run amok in Ukraine since 2014. They’re much more likely to have perpetuated these atrocities on their fellow Ukrainians. Of course, even the Russian speakers in eastern Ukraine are their fellow Ukrainians, but that hasn’t stopped them from committing heinous acts on them, including civilians.
Many don’t realize how fierce the fighting was on the ground in Mariupol - and I do mean fierce. And it was full of Azov and other ‘savages” like them....who have no regard for human life. I think they were so sadistic that resonable to believe the other side wanted payback. So I think we’ll find both sides had a hand in the strocities - and frankly understandable. It was like an Isis blood feast there.