Less than two months after he was given prominent op-ed space in the Washington Post, a video has surfaced of Houthi rebel leader Mohammad Ali al-Houthi launching a shoulder-fired missile and then reciting the Houthi slogan, which calls for “Death to America.” The Washington Post contributor chants, “Allah is the greatest. Death to America. Death to Israel. Curse the Jews. Victory to Islam.” He has also taken to his unverified but media– and think tank-cited Twitter account to repeat the infamous Houthi slogan. Ali Shihabi, the founder of the Arabia Foundation, a Washington D.C.-based Middle East think tank, confirmed to...