Most nuclear scientists in the 1930s/40s thought there was at least a 10% chance that lighting off a nuclear bomb would ignite the atmosphere and set the world on fire. Hitler heard this advice and did not go ahead with the program according to Heisenberg. The jewish administrators of the Manhattan project heard the same things from their own side and went ahead with it anyways, even though it was totally unnecessary to win the war. They just wanted the power that much. I think this is the source: https://odysee.com/@modernpolitics:0/ModPol-Kvetching:7