The Israeli military has withdrawn from Gaza’s main hospital after a two-week raid, saying it had killed some 200 militants and detained hundreds while returning Palestinians described a vast swath of destruction. Hundreds of people returned to Shifa Hospital and the surrounding area after the withdrawal early Monday, where they found bodies inside and outside of the facility. Rear Adm. Daniel Hagari, the top military spokesman, said Hamas and the smaller Islamic Jihad group had established their main northern headquarters inside the hospital. He described days of close-quarters fighting and blamed Hamas for the destruction, saying some fighters had barricaded themselves inside hospital wards while others launched mortar rounds at the compound.