Israel does not have enough nuclear weapons to do this by itself either.

Then again, It would be very on brand under-doing it so we just get nuclear fallout and radiation instead of the intended effect. Egged on by Christian Fascist/Zionists death drive, evangelical rapture prophesies and climate change denialists desperate to keep their treats. They already accepted that 100s of millions will die from climate change, what's a few 10s of millions more.

Remember that we live in the dumbest timeline.