Assuming it's true the US Did nuke fallout experiments on people 7 years after the end of a war, you need to keep in mind, that's what happens after a war. People who are put into combat situtuations look at human life as a numbers game; the experiment on them would have been justified along those lines. Kill some marginal population in horrific ways in a worthwile experiment to save more lives in the future; to a soldier this makes perfect sense.
The problem with war is not the war itself, it's the weapons, including people, you leave laying around after. Once you get the bad lines of thinking started they perpetuate.
You'd do very well for yourself to remember that while you're re-writing the history of WW2. It's one heck of a spin to call the nuking of Hiroshima and Nagasaki "an experiment"; there was a war going on. The Americans knew exactly what was going to happen from the nuke; kill lots of Japs and hope they surrender and given the belligerance of both sides, I'd say they were probably right.
