[TheTimeOfMan]

Destroying mecca would not just bring down the sunni - it would destroy the entire islamic belief system.

[Zuse]

Maybe not.
Check this:

One headline sums it up: “The Alternative To Hajj: Muslims To Arafat And Iranians To Karbala. Does Iran Seek A Sectarian Divide To Replace Mecca?”

http://shoebat.com/2016/09/13/realization-finally-sinking-in-the-muslim-world-that-iran-has-abandoned-mecca-fearing-whats-next/