The fundamental question Pakistan should ask to themselves. If Iran is a friendly country, why Iran and its military does not take Pakistan army into confidence while chasing a terrorist inside the Pakistan border? I beleive that honestly Iran is not anti Pakistan..But again the Iran's love for Pakistan should not mean that Iran will not act against terrorist who are anti Iranian...And if Pakistan is Iran;s friend, the Iran should trust Pakistan that Pakistan is taking enough measure so that none of Iran's terrorist are patronage insider Pakistan by any party.. ...But based on the conduct of the Iran, it seems even they do not trust Pakistan and its army in punishing Irans terrorist or helping Iran to nab terrorist....
It is always an excuse by Pakistan for India that whenever there is a pressure on Pakistan to rein in terrorist then it gives an excuse that terrorist are not state sponsored rather by non state actors...And that trick always works for India ....But when Pakistan applies the same trick for Iran, it is somehow is not working....And that is why inspite of being so friendly country, Iran Army do not even trust to take Pakistan army into confidence while chasing down terrorist...As per report if Iran Army went 2 km inside Pakistan border, then i feel that Iran is not crossing the border not attack Pakistan rather to secure their own border....So Pakistan Army should introspect itself that why all neighouring nation including India, Iran and Afganistan are feeling that terrorist are getting safe heaven in Pakistan and Pakistan Army and Gov is not able to flush them out...If Pakistan is not doing it for India, it makes sense...But why it is for Iran and Afganistan...That is where Pakistan is loosing its credibility