US-backed Israeli forces are already destroying Lebanon: https://www.msn.com/en-us/news/world/mapping-the-destruction...

> Legal experts, analysts and local officials warn that the ultimate objective is the “emptying of residential geography”, carving out a depopulated “buffer zone” at the forward edge of the border that permanently prevents displaced residents from returning and establishes a violently enforced demographic reality on the ground.

That's called "ethnic cleansing" when carried out by other countries. Iran will not agree to peace while this is going on. Partly because that's Iranian proxy forces in there among all the civilians getting killed.