I understand your point. international involvement is jsut one aspect I wanted to mention
as a neutral observer (as neutral I can be) I am merely saying that any hostile agency in any other part of the world will like to take advantage of the situation and work together with most unlikely ally
e.g Iranians supplying Afghan Taliban with weapons which were confiscated by NATO many times. Iranians might deny it but NATO forces have different view about that. now this is unthinkable for a country whose diplomats and citizens were executed and dragged on the streets by the Taliban during their onslaughts during the civil war.
can you expect Western intelligence agencies secretly helping Neo Nazi groups in stirring up the crises in Ukraine that led to the civil war? there are many examples. RAW might not like the idea of colluding with TTP but there are other more "secular" groups who wont mind doing the work under whatever banner suits them. if its not RAW then it can by any other hostile agency both from "brother" countries" and "not so brotherly" countries.
MQM which is sympathetic to minorities and actually has a very secular outlook has its own share of target killers who have killed people of different communities in the single day or night. and whats more? even the PPP leadership has been blamed for having death squads and dealing with LeJ terrorists who would otherwise behead their children and violate their women.
they (leaders) are afraid that their own death squads will turn on them