@RRCo:
I'm not so sure about the Great War atrocities; if anything, they were overblown to the extreme. Problem was that the War Correspondents needed to file lines daily but the military wouldn';t let them anywhere near the Front because it was moving so rapidly and unpredictably. The Warcos then sat in a couple of bars and held a competition to see who could get the most-atrocious atrocity-story actually printed and the the typewriter keys began to heat up. In actual truth, there was a photograph printed in "The Illustrated War News", first half of 1915 IIRC, of the German military commander receiving a citation from the Mayor of Brussels for the fine conduct of the German Army in its occupation of the city. In England, the Ponsonby Commission was set up to get to the bottom of the atrocity-story scandal; it resulted in the issuance of a joint APOLOGY from the House of Commons and the House of Lords..... to the Imperial German Army. One case which they brought forward was the fact that a Belgian woman had been raped by 3 German soldiers; they were shot the following morning by their own Regiment. But there were no "buckets full of soldiers' eyes", no thousands of Belgian babies with their hands chopped off, nor were there enough Nuns serial-raped to provide a rousing choir for Heaven Itself.
ALL FILTHY PROPAGANDA.
The really ugly part is this: THE TRUTH WAS HORRID ENOUGH.
I made a study of Great War atrocity propaganda many years ago. Likely it is still on file at U of M in Graduate Studies/History. Working from the only existing COMPLETE set of the "Brandon Sun", I charted atrocity propaganda during the course of the Great War. And here is a potted version of what I discovered: atrocity propaganda began about 10 days BEFORE Austria-Hungary ever set foot on Serbian soil, reached screaming proportions when the King announced a state of war with the Central Powers and remained at that pitch until after the First Contingent had sailed, fell off and then went UP again at the time of Second Ypres and Givenchy, tapered off, back UP after the next bloodbath at the Front, tapered off, back UP...... You get the idea. Whenever more manpower was needed for the Sausage Machine, the atrocity-tales were trotted out again.
I knew a number of Great War veterans and not one of them ever mentioned line-ups of nuns being raped, thousands of babies with no hands, battlefields littered with eyeless corpses. Nor did the German "CORPSE FACTORY" for rendering down the dead for glycerine to make explosives ever exist, nor did the ubiquitous Crucified Canadian so beloved of the mass media.
What Johnny Canuck and Tommy Atkins felt for Fritz was, if anything, respect for a tough and worthy opponent who was "there" for the same reason they were "there": because he was ordered to be there. What Fritz felt for our guys was much the same. My old friend Jack Snow was taken prisoner at Monchy-le-Preuex, was held by the Germans until the end of the War (apart from a 5-month vacation in sunny Russia).... and did not have a word to say against the German Army itself, only against a couple of individuals who you and I likely would class as first-class ar$eholes. They shackled him when he was captured, yes, but that was a part of "strict regime" as a protest against reports the Germans had of their guys being shackled in our camps. And this was EXPLAINED to Jack by the German officer and it was emphasized that the treatment was NOT personal. The 10 days of bread-and-water diet was ameliorated by the fact that they could have as much bread as they could eat: definitely better than what the German Army was getting at that stage of the war. When finally at Heilsburg in Ostpreussen, he was sent out to an estate to do farm work. He was PAID half a Mark a day in silver, Sunday was a day of rest...... and the Camp Commandant didn't really mind if Jack and his buddies "escaped" from the camp on Saturday night, just so long as they spent their pay at the Commandant's pub and were back in the Camp for Sunday Appel. Jack used at least part of the time to obtain working knowledges of German, Polish and Russian, bits of which he kept for a 65-year lifetime after the War was finished.
I am not saying that ugly things did not occur. What I am saying is that men at that time treated each other with more respect and decency than would have been seemly had they undergone 6 years of demonisation of their putative "enemies" beforehand.
As to the rest of the charges you make, I would really like to see some proof of it having occurred in the West.
In the Turkish war, yes, atrocities did occur. Lawrence documents several in "Seven Pillars of Wisdom", ones in which he had personal involvement. At Gallipoli, entire British units disappeared and their graves, if ever they had any, still are not known. Whatever else may have happened in that far-flung war I do not know. I know only what I have read and what I was told by the men who were there.
On the Eastern Front, ANYTHING could have happened..... and likely did happen. Certainly, there was enough wholesale slaughter of prisoners and murder of civilians after the Bolsheviks became involved. The reason my friend Jack turned back to give himself up to the retreating Germans, only a few miles from Smolensk ("Tar-town", believe it or not) was that he and his Irish and Scots companions had encountered a Priest who mutely told them that they were no longer safe. The Priest was dressed in his ecclesiastical robes, hanging from a telegraph pole, gutted alive and with his "works" stuffed into his mouth. The Bolsheviks REALLY did not approve of the Church.
As to the Thirty Years' War, the fighting actually lasted 48 years. It was a horrific furball and EVERYBODY was involved. Every Army in Europe, in the total absence of modern supply channels, lived for 48 years by plundering and raiding Germany, which was a collection of more than 360 tiny countries, none of them big enough to field a decent army to combat, for example, the Swedes. So the war was HELD IN Germany, but the Germans were the VICTIMS. For the most part, they didn't fight: they simply became the victims of whatever Army might be raiding their lands at any particular time. If THAT did not have an effect upon the German people, then do you have an alternative?
In much the same manner, back in the late 1950s/early 1960s, it was said that the Americans and the Russians were ready to fight to the last Canadian. That idea scared a LOT of people. Some of us have been arguing for a national Militia, locally-based and armed to the teeth, ever since.