First, the fact that the attacks thus far have been attributed largely to Pakistani terrorists doesn't mean that India's internal challenges are less dire.
Indian officials first claimed, based upon the reported testimony of the only surviving gunman, that the attack was perpetrated by 10 Pakistanis associated with the Pakistan-based Lashkar-e-Tayyiba, acting without the assistance of local facilitators. In recent days, Indian officials have embraced the possibility that Indians may have helped support the grisly attack.
Indeed, India will continue to confront an expanding array of internal foes. Until recently, India has generally dismissed the importance of home-grown Islamist militant groups and has focused instead upon the Pakistan-based groups.
Many within and without India have claimed that India's democratic institutions provide Muslims and other marginalized social groups political means to redress their grievances. Yet this narrative obscures the fact that many foreign terrorists have long relied upon Indians for logistical support, and disregards the increasing participation of Indian personnel in India's other recent attacks.