glass the “holy land.” Nuke it all so no one can live there for 200+ years.

Maybe by then […]

Not long enough.

Conflict in the area has been going on for anywhere between 4000 and 200,000 years (lower paleolithic). Since the invention of writing, people of different origins have been able to transmit their religious claims to the region for thousands of years.

200 years would barely put a dent on it.