The Nazi/Japanese control of Europe and Asia was not going to lead to better humanitarian results than what otherwise happened.
The US saved most of Europe from both Nazis and Soviets, and the bulk of East Asia from both Japanese and Communists. And in time the Pax Americana took all that back, directly or indirectly. The better ideologies outlasted the evil religions of the 20th century, and humanity thrived (on the whole).
In the height of the Pax Americana -
https://data.worldbank.org/indicator/NY.GDP.PCAP.PP.CD
Over 400,000 Americans should not have died so that Eastern and Central Europeans and East Asians could be oppressed by communist dictators instead of German and Japanese dictators. Even worse, because we overthrew the Japanese Empire, creating a power vacuum filled by communists, 100,000 more Americans died fighting our communist “allies” in Korea and Vietnam! Mao, Stalin, the Kims, Ho Chi Minh and Pol Pot killed millions more people than Hitler and Tojo did. If Roosevelt had told Churchill that the US would not be propping up the British Empire, since that was another evil a single penny or drop of American blood should have been used to prop up, the British would’ve had to make peace with Germany, and a half million American lives expended fighting for the globalists’ dream of a united world of godless consumers spared, with no reason to think the rest of humanity would’ve been worse off than it was under communist rule.