I know it will be brushed it off as conspiracy theory, but from what I can gather this is part of the Saudi bail out package for Pakistan. Arabs, Israel and Americans are planning a massive offensive against Iran. Normalisation of Arab-Israel/ Sunni -Israel relationship is a must before the final full offensive against Iran. Pakistan being the biggest Sunni military power, they need you guys to be on their side, if not be neutral/nonchalant.
This has been in the offing for quite sometime, and the plan was put in action in Saudi Investor conference. Right after the conference, Oman's statement regarding Israel came out, followed by the news of Israeli jet landing in Pakistan, followed by the Iranian FM visit to Pakistan (That visit was not about the border guards only).
I hope for the sake of peace and stability in the region and its own stability Pakistan does not get itself involved in this Shia-Sunni show down!