Maybe the US should have stayed out of WW2, or at least the European theatre? Western Europe would have fallen under the yoke of a communist dictator for 50 years.
WWII was different though because America joined the war after the Pearl Harbor attack, which was a direct offense by the axis powers. In my opinion America should actually have joined the war effort when Poland was invaded by Nazi Germany because Poland was (iirc) an ally to America. The situation is different with Hong Kong because China already controls Hong Kong. The conflict happening there is more of a civil war.
Maybe the US should have stayed out of WW2, or at least the European theatre? Western Europe would have fallen under the yoke of a communist dictator for 50 years.