Please do keep in mind that, all officials in all countries have to answer to people one way or another (except few countries perhaps). You guys should also consider the domestic situation of Iran. People are now very sensitive about these cross-border attacks that have been happening in past years, and they also put blame on officials for not doing enough to protect the border, besides blaming Pakistan. Part of this statement is directed at Iranians I believe because military officials need to appear determined and strong in situations like this.
I believe behind the scenes, talks have been constructive with Pak officials in this recent case, we shall wait and see. If the news are true, we might see some Pak army units being stationed at Iranian border, and who knows, maybe joint operations.