A hundred billion dollar beam based system to defend against cheap disposable short range rockets is a poor substitute for simply not having somebody nearby with the will and ability to shoot them at cities.
Don't confuse THEL with a system intended to defend against 3,000 Soviet ICBMs. They are 2 different things completely, and the cost of the THEL system is orders of magnitude lower. Besides, as the article pointed out, there are other costs of NOT having THEL - namely, having the economy of northern Israel bascially shut down. Also, there's a cost in the lack of deterrence suffered by Israel, though it is nearly impossible to calculate it.
Correct.
The real solution is to destroy the attackers and the civilian populations until they quiver at the sound of a jet engine.
A "civil" war does not work with an "uncivil" enemy.
Ask the Brits about the Colonial irregulars.