I’ve known Sen. Chuck Schumer (D-N.Y.) since we were schoolmates at PS 197 and James Madison High School in Brooklyn. The high school boasts an impressive number of Jewish graduates who went on to become leaders in their fields of endeavor, from entertainers and sports stars to Nobel Prize winning scientists and well-known public officials, including Sen. Bernie Sanders (I-Vt.) and Supreme Court Justice Ruth Bader Ginsburg. That personal connection made it especially painful for me to watch Sen. Schumer stab Israel in the back in his public remarks on March 14. Sen. Schumer said that the elected Israeli government...