Col Tibbets and his colleagues were not evil.
The camp guards hiding in Canada, on the other
hand, were and are.
Judge the rest on an individual basis, and if cause
exists, bring charges. Good luck finding witnesses to
testify.
Clearly most people, my self included, recognize the Nazi regime as inherently wicked, as were regimes of Lenin, Stalin, Mao, and Pol Pot.
I don't think the crews who dropped the A-Bombs were evil and I don't think they thought they were doing evil.
However, there were unecessary measures taken after the war in Operation Keelhaul in which about a million Russians were repatriated by the U.S. and Britain. These Russians faced death by and large, and our side knew it. Those who took part in Operation Keelhaul knew it was a terrible thing they doing and felt very guilty about it for the most part, I imagine. I think they are very comparable to German soldiers involved in deporting innocent people to concentration camps. I think the analogy is very apt. I think both the German soldiers (and Ukrainians, Latvians, etc.) AND ours did what was morally wrong in these instances. I don't think we should hunting those people because they are "evil" because they are no more evil than their American and British counterparts in these two similar crimes. To be fair, the guiltiest in Operation Keelhaul were our top commanders, and I don't think it would serve any purpose to try them post-mortem for a terrible crime that somehow they excused themselves of in their own minds. They, however, committed as serious a crime against humanity as almost all the "Nazi war criminals" being pursued today.