Had it been a Pakistani instead of an Indian. The Taliban wouldn't care to make such a dubious comment regarding his killing and hold India responsible for it, simply because India is not playing a role as big as Pakistan against the war on terror.
He was killed by Radical Afghan terrorists, and the only reason they are holding Pakistan responsible is to create a turmoil situation between Pakistan and India. The taliban knows that without Pakistan's fight against the 'War on Terror', the taliban could not be defeated, rather these Terrorists would rise even furthur.