ISLAMABAD, Pakistan—New clues emerge: Suicide attacks against Pakistani Shias in Karachi and Kashmir are unprecedented. There have been no sectarian or suicide attacks in Kashmir before. The attack in Karachi is the first major sectarian assault in five years. The Indian role here is critical. India is responsible for poisoning the Afghan well for the Americans and for everyone else. India is the missing part in the story of how US blundered in Afghanistan.