We have lost +50K lives in WOT, our 'local Shiite' population knows it & because of their realization about this fact, there is no issue of SHIA-SUNNI in Pakistan as per the wishes of some of our neighbors.
This might be interesting for you to know that some so-called liberal Baloch Nationalist elements (who are drawing their findings and support from the west & India) are in an alliance with SUNNI EXTREMIST groups (I know Indians will term it as a blame).
For Pakistani members who are considering the Iranian actions 'only in the context of Afghanistan' are wrong, this time it has Midel Eastern angle as well.