GAZA CITY, Palestine/ISTANBUL For 17 years, the Abu Hamad family waited for a child. When he finally arrived, the Israeli siege, winter cold and environmental collapse took him away. Six-month-old Yousef Abu Hamad died earlier this week after prolonged exposure to bitter cold and sewage contamination near his family’s makeshift shelter in the al-Mawasi area, west of Khan Younis in southern Gaza. His death comes as Palestinians in the enclave endure worsening conditions, compounded by winter