By opting out of the mutually agreed round of talks, under the pretense of Pakistan meddling in India's internal affairs, India has made a move which would be considered highly unprofessional in diplomatic circles. It is an overreaction and will be internationally interpreted as India's lack of seriousness to initiate and continue dialogue and her unwillingness to mitigate hostilities in the region.
Mind you, officials from Pakistani embassy in India and even from Pakistani foreign ministry have been engaging Huriyyat leader for many years, so it's is important to note that recent invitation was not the first one and hence, under this context, it is understandable why such an Indian response can be called over-reaction.
I personally am of the view that current Indian govt., having an inaccurate perception of it's strategic leverage over Pakistan, has evidently tried to overplay her soft power. Indian policy makers, for some incomprehensible reason believe that Pakistan can be strong-armed into participating in a dialogue based upon terms and conditions set by India, which is untrue. Pakistan has very little, perhaps nothing, to lose if dialogue falls apart. Same can't be said for India.
To think that any concrete agreement can be reached in dialogues that are contingent upon dictatorial preconditions and where negotiating parties are not held as equals is naive and speaking freely, a waste of time and resources I hope Pakistani policy makers decide to stay away from such monologues where theme/agenda and rules are imposed by India, monologues which are most likely going to be crammed with unilateral and unyielding harping about terrorism.
Also, it is become quite monotonous to illustrate the fruitfulness of such dialogues if the most fundamental point of contention i.e Kashmir dispute isn't even placed on the agenda. Unless this issue is resolved in a fair manner, peace (or semblance of it) will be volatile and precarious, if ever achieved.