MARKING the first day of Ramadan alone among the graves of his loved ones at a cemetery in Gaza, Ibrahim Hassouna listened to a voicemail message his mother left him before she was killed in Israel's military offensive on the Palestinian territory. Normally a time of religious devotion and joyful family meals after each day's fasting, this year's Muslim holy month could not lift Hassouna from his deep sorrow at the loss of his mother, father, brothers and their families in the war. Listening to his mother's voice on his phone was bittersweet, bringing back memories of how she used to fret…