NETANYA, Israel – For five nightmarish months, the parents of Daniel Perez and Itay Chen thought their sons, both soldiers based at a military outpost less than a mile from the Gaza border on Oct. 7, were being held hostage by Hamas in conditions they could hardly bear to think about. They lobbied and prayed for their sons’ release. Last month, the Israeli army made a devastating announcement based on battlefield intelligence gleaned during their ground operation in Gaza: The two men had been killed on Oct. 7, their bodies dragged into Gaza.