Maybe if Israel didn't feel immortal, they'd actually negotiate.
Incidentally, this is not an important issue, but if you hold the lives of Israeli citizens as being that much more important than those of Palestinians, it still makes sense to undermine the Iron Dome. The dome is the reason Hamas has long resorted to the tactic of launching scattershot missiles all over the place, because it's something of a counter to what the dome is good at, and this is a major source of the (relatively sparse) civilian casualties on the Israeli side. Without the dome, or with it in a very reduced state, Hamas would be in a better position to use missiles in a much more targeted way.