You're willfully ignoring that atmospheric tests are banned since 1963, the devices weren't detonated at the same time, many had a much lower yield than what'd

You're willfully ignoring that atmospheric tests are banned since 1963, the devices weren't detonated at the same time, many had a much lower yield than what'd be used in a nuclear war, and many were detonated at altitudes preventing fallout. But most importantly, the vast majority of them didn't cause firestorms - which means no smoke particles, which is the major issue in how severe nuclear winter would be. It's probably also worth understanding that your misguided argument is a very deliberately placed piece of disinfo aimed at discrediting climate science. ("See, not even nuclear winter they got right")