On May 10, many flowers and many boxes of chocolates will be gifted to mothers in the United States, Canada and elsewhere. Greetings will be filled with joy and gratitude for maternal presence. Mothers will wear their finest clothes to spend time with their children, receive gifts and enjoy a beautiful day. It is no wonder most countries in the world have a Mother’s Day, even if it is on different dates. Motherhood is a wondrous thing, and it needs to be celebrated. But there is one place on Earth where it brings heartache to many. In Gaza, where 22,000 women have been killed in two and a half years, many children dread this special day because it reminds them of intolerable pain. Too many mothers have died and many more are gravely ill. My own mother, Najat, who is just 46 years old, is suffering from cancer, which was diagnosed quite late. On March 21, when the Arab world celebrated their mothers, I did not say “Happy Mother’s Day” to mine.…