It’s not the logistics, its the end solution to the problem.
Think about what is downwind. Because everything in that area comes down to that last final solution.
Depending on the jet stream, India, Pakistan, China, NK.
At least three of them are nuclear powers. Only takes one of them to get pissed off that someone made their water and topsoil hazardous.
Suddenly NYC, Philly and Bangor are aglow.
Israel feels threatened and multiple capitals cease to exist.
The entire Middle East is a chess game where the board should be wrapped in bubble wrap.
Short of that, in 5000 years, no one there has gotten along for more than about 12 seconds. Its part of the area and cultures.