Land incursion

If Israel attacks Hezbollah on the ground, it is likely to have trouble seizing all the territory it seeks to occupy.

Hezbollah succeeded in resisting Israel's invasion in 2006, and is likely to have even better fortifications now.

In Gaza, Israeli units can occupy any piece of ground but can't wipe out HAMAS in its tunnels. Hezbollah's tunnels are designed for fighting from, not only for hiding in, so Israel can't expect to have control of the surface as it does in Gaza.

I think this threat represents Netanyahu's scheme to stay in power by unceasing escalation.