Should doesn't enter into this. Israel is going to do what Israel is going to do and the increasingly Jew hating western nations and, of course, the Islamic world, are going to do what they are going to do in response.
When HAMAS raped, mutilated, and murdered their way through parts of Israel . . . should went right out the window. What's occurring now are the inevitable consequences . . . grim and gory as they probably will become.