" Why was helping Stalin against Hitler the correct thing to do? Stalin butchered more people than Hitler, and pre-WW2 Soviet Russia was indisputably more murderous than Nazi Germany. So, somebody please justify allying with Stalin."
The 799,455 executions which took place from 1921-1953 does not come close to the millions murdered by Hitler in a handful of years. Most people who entered the gulags, left them, with the exception of a couple of war years when conditions of the prisons were bad due to the war. The fatality rate for most of this period was quite low. And most of the people interned with actual criminals, not political dissidents. The famine was not "man-made" but was the result of widespread crop failure combined with civil unrest between poor peasants and rich peasants, in which the latter burnt their crops and killed their livestock rather than submit to collectivization. Furthermore the fact that so many Ukrainians enthusiastically resisted the Nazi invasion (a half million guerillas and between 4 & 5 million soldiers), as well as the fact that the Soviets had a successful harvest in 1933 with great effort being placed in improving agricultural production in the Ukraine, and the fact that large increases in production followed in the years running up to the war, give lie to this claim that the famine was "man-made". As does the fact that the famine went beyond just Ukraine and took place in areas that were not resistant to collectivization.
"Why would Japan willfully attack the United States except as an act of preemption? Does anyone think Japan actually thought they could defeat the United States? If the U.S. had remained neutral toward Japan and practiced non-interventionism in Southeast Asia, would Japan have attacked us? ""
In a long term war of attrition? No, Japan had no hope of victory. But Japan thought a quick knock out blow against the NEI, Malaya, and the Philippines would force the Allies to peace terms favorable to them. The fact is the Allies might have been conciliatory to Japan in light of the German invasion of the USSR, since they wanted to keep Japan, a signatory of the Tripartite Pact, out of that conflict. But the problem was the Japanese invasion of southern Indochina. Quite frankly, Japan's military regime was far too aggressive relative to its capabilities. You have to admit that occupying the South China Sea Islands, invading China, attacking the Soviets along the Mongolian border, invading northern Indochina (which was met with sanctions) and then refusing to heed warnings and invading southern Indochina (which was met with a total asset freeze) was highly aggressive. Not to mention the Tripartite Pact, which meant that Roosevelt, which was much more concerned about Germany than Japan, had to concern himself with a Japanese attack if he ever did convince the country to intervene.
"Did Pearl Harbor justify the Tokyo fire-bombings, Nagasaki and Hiroshima? Attacking a genuine military target in an act of aggression is morally reprehensible, but does it really justify the deaths of a few hundred thousand Japanese civilians? ""
No, certainly not. That's neither here nor there about who is to blame about the origins of the pacific war though.