People that deny nuclear weapons have 0 understanding of them and the science behind them.
Did you know that Hiroshima/Nagasaki weren't even in the top 10 most damaged cities in Japan after World War 2?
In mere days after the 2 "nuclear bombs" were dropped, the Japanese people were moving back into these cities, and rebuilding.
The people living in these cities today have a higher life expectancy than people in the USA. There is no "nuclear fallout", poisoned water, food, let alone people/animals' skin melting, turning into zombies or any of these horror movie effects that were made up for just that - dramatic Hollywood movies, HBO specials, and video games.
The entire concept of "nuclear weapons" as these bombs that poison everything for centuries and turn all life into deformed zombies is just a fearmongering fabrication, that's still used to this day to scare people into fighting in wars thousands of miles away that have nothing to do with them.