Being the new kid is always hard, but try starting the year with a name like Mohammed Omar Mohammed Abu Srour, with a homemade lunch of humus and za'atar. On top of that, on the very first day of school, a kid tells his older hijab-wearing sister to "go back where you came from." Mohammed and his sister love their grandmother, but she thinks her stories about life in Palestine will help them with their problems. What does Grandmother's ancient...