I don't think it anyone was trying to devalue a certain person or peoples for being "evil". I'm not denying that all countries have had their fair share of war crimes, but a lot of them weren't without reason. On the subject of nuking of Japan, you have to admit that Japan had already refused to surrender, and there were confirmed reports of soldiers attempting to inspire suicide upon Japanese civilians; to use grenades in order to become martyrs for their country. Those dead Japanese? They weren't exactly in the right hands either way, and a total land invasion which would add on to the numerous American causalities felt in the pacific would be an unnecessary burden. The Japanese had their chance to surrender, and the fact that they didn't was detrimental to the welfare of their citizens.
Yes, there were people like Mussolini and Stalin who also caused surmounted deaths to the citizens that of their own country, but the undeniable difference of Hitler's regime was that it was a targeted attacks against Jews in general, thus creating a scapegoat. What started as the inhumane degrading of the religion continued to the point where they were considered expendable, and it was portrayed as a rightful duty to step up and purge them. Genocide.
The Swastika isn't evil, but it happened to represent at one point one of the most publicly genocidal parties of history, and obviously people are going to attach a negative connotation to it.
There is lots of evil throughout history, and you are right, war is war, but when you weigh it all together, no country is more sane than the other. It's all about strategics, and making the decision that compromises your position in war with the people's welfare. Nuking Japan wasn't an easy choice, you have to realize. But, ultimately, that is the choice that was taken, and it was the consequence the Japanese war machine faced for lacking in any integrity to surrender peacefully.
