There's should be no moral relativity here and the argument is of no interest to all those dead children and their families.

The only moral relativity, in my view, is the fact that Ukr air defences were responsible for the deaths of people, and that Russians are being blamed for it. Just facts. In any case, we do know that Ukr attacks on Belgorod and Donetsk for that matter, are deliberately aimed at civilians. Russians are very careful and concentrate on military infrastructure, very much unlike western shock and awe destruction of civilian infrastructure and civilian targets during western forever wars. Equating the two approaches is a cynical neglect of the facts. Just sayin'.