Absurd idea to align against Iran. It is only Pakistan's financial dependence on the rich Arab states that is preventing Pakistan for being more pro Iran. And now that even America is close to making a historic detante with Iran then why would Pakistan become anti Iran now?!
Even when Iran was confronting dozens of nations in the 80s in the Iran-Iraq war and even when then there was the Mullah President Zia ul Haq Pakistan remained neutral.
In fact, if there is any credence in the rumours, Pakistani generals had tried to help Iran in the 90s with nuclear technology.
On the whole, Pakistan can proudly say, Pakistanis are still not sectarian unlike many Muslim countries.
Anyway, Nawaz Sharif will never sell out Pakistan to KSA; you may not like him but I don't question his patriotism.