Just now Jeremy BowenBBC Panorama Diaa, a middle-aged father and husband, was a polite host at his family home in one of the refugee camps in central Gaza. But you could see his pain. "Please come in. This is Abdullah's room." Abdullah was his 19-year-old eldest son. On 2 August he was shot dead waiting for the daily opening of one of the food distribution sites run by the Gaza Humanitarian Foundation (GHF). It started operating in Gaza in May, established by Israel and the US and protected by the Israeli military, the IDF, and armed American security guards who...