Its almost like it was 1945 and the US was the only country at the time to have created nuclear weapons. Please open a history book.The US nuked Japan and no retaliation, instead surrendered.
Sure, other countries beside Russia and China cannot retaliate tit for tat with the US, but under what realistic circumstances would the US nuke India, Israel, UK and France for? Unless MAD has already kicked off, I don't see it happening. In NK case, what's stopping them from nuking SK and US assets in the region as retaliation?What you meant "other countries" here are China and Russia who can retaliate properly, other nuke countries India, Israel, NK, UK and in some extent France, wouldn't be able to retaliate to the US