In a major escalation of diplomatic pressure, Pakistan has launched a sweeping offensive targeting Afghan authorities following the deadly Karachi attack. Twin demarches were delivered simultaneously to the Afghan Charge d'Affaires in Islamabad and through Pakistan's Ambassador Nizamani in Kabul. The demarches are backed by what Islamabad calls 'undeniable, concrete evidence' — including the capture of an Afghan national alive at the scene. This evidence, according to official sources, conclusively proves that Afghan territory was used as a staging ground and safe haven for the terrorists responsible. The move signals a zero-tolerance policy from Pakistan, demanding accountability and action from the Afghan government. In my opinion, this is a watershed moment for regional security. For years, Islamabad has alleged that militant groups operate with impunity from Afghan soil, often dismissed as rhetoric. Now, with a living suspect and forensic proof, Pakistan has effectively forced the world — and Kabul — to confront an uncomfortable truth. The diplomatic offensive is not just about condemnation; it is a clear ultimatum. If Afghanistan fails to act, Pakistan may be compelled to take unilateral measures. This could further strain already fragile ties, but it also presents an opportunity for genuine cross-border cooperation against a common enemy: terrorism.