CAIRO: The Houthis, Al-Qaeda and Daesh come from sharply different religious traditions. The Yemeni militia is rooted in a hard-line interpretation of Zaidi Shiism, while Al-Qaeda and Daesh emerged from extremist movements. Their doctrinal disagreements are profound, and they have fought each other on the ground. Yet the differences can obscure a more consequential question: Which poses the greater long-term threat to Yemen and the wider region? The answer cannot be measured solely by the number
