First, a clarification -- what I mean by "Islamization" is the recent rise (as in, post 1975) of legally imposed Sharia Law in countries with Muslim majority populations across the world (eg Pakistan in the late 70's). As a non-Muslim (kufr) myself, and a non-expert by all means, I would like to know, for those who know more than me on this, if this is indeed a thing.
And if it is, that brings me to the main question -- what is the most recent PoD possible to prevent or seriously curb this recent development across the Islamic world? And, given this PoD, how would subsequent history, and the affected parts of the globe, be different today?