Israel’s defence ministry headquarters used to soar over Tel Aviv as a symbol of might but for the families of hostages now gathered beneath it the building has become a focal point of anguish. Relatives filled the plaza opposite the 17-storey Matcal tower on Saturday to demand that a state founded to protect Jews respect that covenant by doing everything possible to save the captives in Gaza. The escalation of Israel’s assault on the enclave stoked dread that their loved ones were on the receiving end of tank shells and air force bombs, or reprisals by Hamas captors, and raised...