All countries in the Middle East (including Iran) voted repeatedly for a nuclear-free zone in the Middle East, except Israel. The last time it was proposed, the only other country opposing it was the US.

This is an almost certain way to assure Iran does not develop nuclear weapons.

Decades ago, when Israel was surrounded by countries that called for attacking and destroying an outnumbered Israel, Israel needed a nuclear deterrent against that possible attack. Even though Israel won its wars against all the much bigger Arab armies, there was no guarantee that it always would. But now many of those countries have made peace with Israel. Israel may want nuclear weapons but it doesn't need them. And the US doesn't need to insist that Israel keep them.