Hamas has built “a labyrinth of tunnels under Gaza, as wide as a city,” CNN reported on October 14. The tunnels were used to facilitate the Hamas pogrom, and the 150 Israelis whom Hamas kidnapped probably are being held there. So how did Hamas acquire the cement, despite Israel’s blockade of such materials? Apparently Hamas had some help from former U.S. Mideast envoy Dennis Ross—according to Ross himself. Ross has been appearing as an expert commentator on major media outlets in recent days, including on NBC-TV’s “Meet the Press” on October 8, CNN’s “Amanpour and Company” on October 13, and...