Bangladesh, Nov. 19 -- Bangladesh is now caught in the crosshairs of a dangerous geopolitical collision – one that its political leadership can no longer dismiss as coincidence or rumor. A massive madrasa near Dhaka, previously flagged by security agencies as a breeding ground for radicalization, has abruptly shut down its entire operations, with senior members disappearing overnight. This shock closure came immediately after the arrest of several medical practitioners from Faridabad-based Al Falah University, as well as the detention of Jawad Ahmed Siddiqui, the powerful chairman of the Al Falah group, in connection with the recent Delhi blast.

For counterterrorism experts, this chain of events is not only suspicious — it is...