“One was holding POWs in a war zone. Another was not informing the opposite side (or a neutral party) of the time and means of a prisoner transfer.”
The other is SHOOTING DOWN a plane with POWs in it.
Not informing the Ukrainians that their POWs were in it was a violation. If the Ukrainians had known that they would not have fired on the plane.
Btw it is also a violation to put POWs on a plane, ship or location to act as “human shields”.
Otherwise the plane was a valid military target.
That’s just what Russians are saying, but everyone knows Russians lie all the time. There is no reason to trust them.
It may be a sensible strategy for Russians to lie all the time because the only ones who believe them are absolute idiots, who never mind being lied to no matter how many times or how blatantly. For these immoral bastards - no downside.