Ok, but WWII wasn't really a horrifying war because of the number of _American_ casualties. The US lost 0.35% of its population as casualties to WWII, which was pretty close to the percentage of the _world_ population, _including non-participating countries_, that died in WWII (0.33%). Russia, which _was_ a good example of a country that got hit hard by WWII, lost 15%.

By contrast, the US _is_ one of the countries hit hardest by covid -- the US has about 5x the number of deaths per capita as the world average.

It's a little less egregious if the original poster meant "US casualties in WWII vs US deaths from covid" but it's still a misleading comparison.