They wont. But if they did, it would be an interesting political move. It would demonstrate unambiguously that:
they have nukes (everybody sorta knows, but its never been confirmed)
they are willing to use them in anger against their enemies (only the second country to use them agains enemies)
they are willing to engage in a first strike (many countries are cimitted to not being the first to send the spicy boi)
they are willing to use them against a non-existential threat (many countries intend only to use them only when faced with, or after experiencing annihilation)
they are willing to use them on their own doorstep, to the peril of hostages, enemy civilians, and their own citizens/fisheries/farmland in the region
This would be such a radical nuclear doctrine that it would genuinely give all arab countries, and Iran, pause to consider their own safety.