Iron Dome?
By The idea behind Iron Dome is that Israel can (with US assistance) spend several hundred million dollars to develop and purchase a set of batteries that can launch interceptor missiles that cost at least $20000 a pop to shoot down unguided rockets that cost several hundred dollars each.
If this works exactly as expected, and shoots down 80-90% of incoming rockets, it provides a strong incentive for Hamas and Hezbollah to launch rockets into Israel (even a miss is a hit at those prices!). If, as Ted Postol and others suggest, the hit rate is much lower, Iron Dome provides even more of an incentive for Hamas to launch rockets.
But hey, at least the protection that Iron Dome provides means that Israel doesn’t need to blast the bejeezus out of Gaza every two years, amirite?