Former Irish president Mary Robinson has called on the United States to make arms deliveries to Israel conditional on restraint in the Gaza war, otherwise Washington risks being linked to civilian casualties in the fighting, she warned. The scale of killings of innocent civilians in Gaza is unacceptable and purely verbal calls for restraint are not enough, Robinson told the US news channel CNN on Wednesday. Robinson chairs the Elders, an international non-governmental organization (NGO) of senior statesmen and women, peace activists and human rights advocates, which was founded by Nelson Mande…