Okay so if we follow your way of thinking we don't have the tight to judge what hitler did, we don't have the right to judge order 227, we don't have the right to judge Stalin, Mussolini and others men who send people to their death ?
I can explain and understand Hitler's anger. Europe rised their killer by their own hands, cos Germany after WWI was country with no reputation, country, which everyone could humiliate and insult... Only few countries supported Germany those days with keeping normal diplomacy and trade relations, one of them was USSR, lol. Of course, people of Germany could not take it too long, and they choose on democratic elections man, who said, that he will make Germany great again, and will punish all those jews in Europe, who fucked his great country since 20s. Although, that was not jews, but mindless europian politics, who couldn't predict consequences of their actions about Germany.
Whatever happens next is terrible, most horrific war in world's history. But... it was inevitable. So, yes, we can say, that Hitler was terrible, bad, no excuse for that tyran... but we shouldn't forget reasons of that. Only combined understanding of historic actions AND their reasons gives us most objective understanding of history.
Order 227 was made, for to keep soldier's morale in difficult times of 42-43, when it was important to hold the line 'till the last. And that order wasn't so terryfing, like Relic shown us in campaign or western "objective" histroics write. Nobody shooted in soldier's backs with Maxims, nobody shooted soldiers, who ignored the order, but still did right thing. They could be punished, yes, but not exectued. And of course, nobody shooted retreating soldiers, because any reasoable commander understands, how important it is too keep your manpower alive. So, that shit about "Order 227" is mostly western progapanda.
I don't also judge Stalin or Mussolini. That idea, that "Stalin killed more than Hitler" is right only in numbers, but nobody talks about reasons and results. Whatever Stalin did it just made USSR harder. Just in 5 years poor farmer's country was turned into massive industrial beast. All that industry, later, provide to Red Army all that strenght, that stopped Hitler's forces and pushed them back into their lair and killed there. Yea, a lot of innocent people died, a lot of political prioners were... But soviet lived in hard times, USSR got hard lider, that could make hard, but important desicions.
And there is nothing wrong in sending "men to death" in politics, because - it is politics. As future officer myself I understand it. No matter how good men under your command you have you should understand 1 thing - they are in real war just expendable material, resourse, like oil or money. It's your job, as commander, as leader, as leader of entire country to use and spend those resourses right, for to get results. Nobody can judge you for you doing your job, but you can be judged for doing your job wrong. Stalin did a lot of wrong things in 1941-42, nobody excueses him for that. But still, he won that war, he saved our country, liberated Europe from nazi, captured Berlin.
So, I think, Stalin used all his resourses pretty well, if we will look on results.