I'm sure USA armies have killed more people than Hitler's armies.
While US made critical contribution in WW2, it was Russian blood that sucked German army white.
Interestingly, the Russian invasion of Manchuria (i.e. their entry into the Pacific theater) also played a much more significant role in Japan's surrender than most of us were taught in history class. The US had been firebombing Japanese cities for months, so the atom bombs, while devastating, were not an order of magnitude escalation, whereas the Russian invasion certainly was.
I sure hope that HN readers see the many faults in the logic and morality of such a statement.