This whole subject is not my "special interest" so inaccuracies might be around, but I tried to fact check things and names.
Damn. I can't abandon the subject yet, as there were inaccuracies. I say few more things that should have been said in the first place. I don't mean that I want Jonn to read and respond, and I don't mean to keep up the debate about opinions how to interpret facts (though I would be happy to be corrected or given another perspective), it is just meant to be a complement to my previous info dump:
First of all, my main indignation is about combined "murder them through starvation, because can't poison the water supply" accusations, not about the fact that period from 1945 to 1947 had consciously caused malnutrition that turned to an outright famine killing hundreds of thousands both directly and indirectly. If it would have been just "allies murdered through starvation" or "allies deliberately caused starvation" I wouldn't have had anything to comment (thought I frown to loaded language of the first phrase).
Secondly, to be clear, Morgenthau did have a very cold-hearted approach: His plan accepted and demanded that the German population must shrink to match the Germany's agricultural capacity. He didn't specifically say that Germans should be exterminated, but accepted that there will deaths, and it is hard to not agree that it sounds like intentionally caused famine deaths. If Morgenthau's Plan would have been implemented, I agree that it would have been outright planned mass murder. Nastiest thing is that most criticism inside the government wasn't even about the morals of the plan, only about its feasibility because of its spillover effects to the recovery of the rest of Europe.
However, while JCS 1067 either followed or allowed to follow the Morgenthau's Plan in many parts, it distanced US from its most controversial parts, dropped out the dedication to the "shrinking population", and it didn't contain long-term plans about Germany's future. JCS 1067 was also more compliant with Haag Conventions. There was no political interest of being accused doing exactly same that Nazis were doing, and consequently that and the distribution of calories were a continuous matter of debate in US Senate ("starvation policy" was often mentioned).
However, the practical implementation of JCS 1067, despite taking a little softer approach than Morgenthau's Plan, still had same kind of consequences: For example, in 1945-46 when actions against malnutrition were taken, the rest of the Europe was prioritized (as part of that "don't let German people be better than neighbors"-thing), resulting that when other Western countries (ones not under Soviet rule) were just hungry (Luxembourg, Belgium, Italy getting worst of it), Germany ended up actually starving (together with Austria, despite it not being a target of JCS 1067 policies). It actually is debatable if calories given to Germans would have been higher or not if physical conditions (logistics, infrastructure, organizational disarray...) would have been better. If they wouldn't have been, the case for attempted murder by famine would be stronger. We can't know that because the policy was changed so quickly.