There is no justification for this massive military action on the part of Israel,

No government can remain inactive while its people are subject to bombardment.
Physical casualties in Israel are few because the terrified families are cowering in shelters instead of going to work or the children to school.

McG, I take it you agree that is unacceptable, so what other non-violent response can they make?
no honest person can believe that there is any question of that kind of justification for the present use of violence by either side.
I am an honest person.
Israel's actions have already brought about a large reduction in missile launches.
Again, what else could they have done?

Why don't the Gazans just stop firing missiles?
Why do you Lefties all ignore the effect the missiles have on their terrified targets?