i take your point on the intricacy of domestic politics, demonstrations of patriotism, hindsight effect etc but as regards macarthur from the links we've provided (mine leads to yours: check macarthur's views on hiroshima & nagasaki)
~~~GENERAL DOUGLAS MacARTHUR
MacArthur biographer William Manchester has described MacArthur's reaction to the issuance by the Allies of the Potsdam Proclamation to Japan: "...the Potsdam declaration in July, demand[ed] that Japan surrender unconditionally or face 'prompt and utter destruction.' MacArthur was appalled. He knew that the Japanese would never renounce their emperor, and that without him an orderly transition to peace would be impossible anyhow, because his people would never submit to Allied occupation unless he ordered it. Ironically, when the surrender did come, it was conditional, and the condition was a continuation of the imperial reign. Had the General's advice been followed, the resort to atomic weapons at Hiroshima and Nagasaki might have been unnecessary."
William Manchester, American Caesar: Douglas MacArthur 1880-1964, pg. 512.
Norman Cousins was a consultant to General MacArthur during the American occupation of Japan. Cousins writes of his conversations with MacArthur, "MacArthur's views about the decision to drop the atomic bomb on Hiroshima and Nagasaki were starkly different from what the general public supposed." He continues, "When I asked General MacArthur about the decision to drop the bomb, I was surprised to learn he had not even been consulted. What, I asked, would his advice have been? He replied that he saw no military justification for the dropping of the bomb. The war might have ended weeks earlier, he said, if the United States had agreed, as it later did anyway, to the retention of the institution of the emperor."
Norman Cousins, The Pathology of Power, pg. 65, 70-71.
in any case, agree that macarthur's views are just one man's views... my point is we have yet to see a proper military justification for NAGASAKI, and no matter where u look, there isn't any... its just not good enough to try and sweep the issue under the carpet by lumping it together with the already fragile rationale for the hiroshima bombing...