Instead we have the USSR, who killed millions more than Germany and we have the liberal west, who, through abortion, have promoted the largest genocide in human history, 50 Million each year; and each with their share of war crimes and genocides. So who among them is good? They are all evil.
What is the symbol of the German soldier? The cross. What motto did they wear on their belts? "God is with us". They were fighting the USSR, who, from the 20s to the end of the 40s genocided Poles (Polish Action of the NKVD, Katyn Massacre), Ukrainians (Holodomor) and Germans (genocide of Prussia and Sudetenland) and other ethnic groups, and often in the most barbaric ways imaginable. You can google "torture of Captain Rosinsky" if you want to see what they did with captured Polish soldiers (it involves mutilation and impalement). The Germans believed that they were fighting the ultimate evil. Many of them joined the SS because they were urged to by their churches. They saw it as Europe's final crusade against the atheistic and barbaric communists; the regime of the antichrist who were slaughtering innocents by the millions, and they were the protectors of the innocent, the heroic and knightly defenders of Europe and Christendom... and just like every other crusade it failed miserably. By 1942 they realized they were deep in enemy territory and were being shot at from behind by ununiformed soldiers and partisans. 500,000 German soldiers were killed by partisan activity in ww2. They engaged in reprisal attacks, which were only outlawed after the war in 1947. France, before it surrendered, had a 1:25 ratio as a matter of policy (25 German civilians killed for every French killed by partisan actions). Soviets had a 1:100 ratio. Calculate the ratio the Germans had by the number of civilians they killed divided by the number of soldiers they lost to partisans. They were the most merciful of all the land powers given the scale of the conflict! And yet, they depopulated entire regions as a matter of maintaining their occupation. After the war, the eastern half of Germany was genocided, and German POWs were used for slave labor for decades, many never returned home. That is what happens in war, you fight for your survival and do whatever it takes because if you lose, they will genocide half your country and say you deserve it, and call you the bad guy while denying all wrongdoing of their own. That's what happened to Germany and it's what would have happened to the USSR had Germany won. It's what would have happened to Japan if they hadn't surrendered, and it's what happened to China. It's what USA did to North Korea (they deliberately bombed civilian residences), and to the native Americans before that, and what the colonial powers did to their conquests... and all in the name of the greater good of mankind.
So what is the lesson to be learnt from all these wars? If you fight evil with evil, you turn good into evil. The only way to fight evil is as Jesus said, do not resist an evil man, but turn the other cheek. If you fight evil with good, you turn evil to good.