"What is Hizbollah doing massed on the border of Israel with thousands of rockets aimed at them?"

A similar question could be levelled at Israel. Except their vastly greater weaponry is slightly different, and with a modern airforce you don't need to be massed on a border.

So far as Hezbollah is concerned I'd imagine that some misguided notion that the arsenal of rockets might deter an attack by Israel might have entered into it.