I'm not saying that it was a very isolated rogue bunch of scumbags that did the beheading. The Russian government seems to have been actively recruiting scum into their forces, and it may well be the policy of their military to terrorise both Ukrainian soldiers and civilians. That still doesn't mean that the bulk of the Russian army, subjected to endless unopposed propaganda, and consisting of 19 year old Dymitri, who desperately wants his mum every time he's under fire, and 24 year old Bogdan, who feeds the ducks in the park each Sunday, and has a strange affection for some foreign football team called Everton, deserve to be treated as less than human.
We're all human, and naturally want to punish the filth who murder prisoners for fun, but let's not get drawn down to the level where we want anyone in the enemy uniform to be shot against a wall. We're all part of the human family, like it, or not.