Why doesnt the us nuke entire middle east?

The United States has not and is not planning to nuke the entire Middle East. Nuclear weapons are seen as a last resort weapon, and the US has never used them in combat before. Furthermore, the US has international treaties that prevent it from using nuclear weapons against non-nuclear states unless their survival is at stake. Additionally, nuking the entire Middle East would create widespread chaos and instability, which would not be beneficial for the US or any other country.