Rabbi Mordechai Lightstone, social media editor for Chabad.org and the founder of Techtribe, discovered during a recent renovation that his walls were insulated with Yiddish newspaper. (Courtesy) (JTA) — (New York Jewish Week via JTA ) — Mordechai Lightstone and his wife, Chana, are renovating their house in Brooklyn’s Crown Heights — removing walls in the living room, dining room and hallway — so they’ll have plenty of space for guests when they are able to start hosting visitors again. Lightstone, 37 — who describes himself in his Twitter bio as the “Rabbi for the Extremely Online” — runs Techtribe...