Noah Pollak unveils what he sees as the real goal of the Gaza invasion:
[I]t is intended to push Hamas off the territory it has been using near the Israeli border to launch rockets.
I'm not sure how that works in practice for more than a short time. I'll respond to his just war questions later but wanted to link to this point first.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2009/01/-just-war/207136/
