Attack on one more consulate will make Pakistan's life difficult and it will be heading into a quagmire. Attack on Kabul embassy has already put a lot of pressure on ISI and Pak govt., if you don't remember.
The same people also said this
The atlantique plane "may have strayed into restricted space", and that Islamabad was unable to explain why it was flying so close to the border.
BBC Link
Prohibiting transport of goods to a land locked country is against the Natural justice. As long as this transport of goods are not used against Iran, it cannot stop this.
It may not have happened before, but it will start happening from now on, once the highway is completed.
Not as bad as Indo-pak relationship. Moreover all they need is money for allowing transport through Iran. A new highway is constructed by India, just for this