An Israeli hostage mistakenly killed by soldiers in the Gaza Strip was buried on Sunday, with his brother accusing the army of having “abandoned” and “murdered” him. Alon Shamriz, 26, was one of the three Israeli hostages shot dead Friday by soldiers during combat in the Gaza City district of Shejaiya, even as they carried a white flag and cried for help in Hebrew. Shamriz, Yotam Haim and Samer El-Talalqa were killed when troops mistook them for a threat and opened fire, the army said. “Those who abandoned you also murdered you after all that you did right,” Ido, Shamriz’s brother, said at the…