'Want to hold an AK-47 & kill Jews,' says slain Hamas chief's 10-yr-old son in letter. Israel Defense Forces released a letter allegedly written by ex-Hamas leader Yahya Sinwar's son. In the 2024 letter, the 10-year-old wrote, "I'm constantly making pistols, tanks...Kalashnikovs (AK-47s) out of paper and cardboard," adding that he wanted to hold a Kalashnikov and shoot Jews. The boy also asks when his father will return and sleep with his arms around him.