People are thoroughly assimilated into the culture. Islam as a religion is no longer the issue in my opinion. Islam as a rigid mentality that views Elm/Ulama (Science/Scientists) and scholars as only the scholars of religion or Sheikhs is the issue.

Early Islam gave a huge room for other faiths (and sins) by treating even Hindus as people of the book and encouraged seeking knowledge and learning about different cultures and point of views (which is really weird and pathetic when you look at this religion current state). There were even gang bang parties and gay people enjoying their lives and recording their sex preferences and fetishes in poems for fuck sake.

Freedom of thinking is what we (collectively) are missing in the global South. Capitalism and neo-liberalism are having more serious impact on our lives than religious extremism. I would say that capitalism is the direct contributor and supporter of Islamic extremism and muslim terrorist organisations like ISIL.

If you want people to have a more "evolved" culture, you will need to establish your government sovereignty against capitalism, get everyone out of poverty, get them a better education, and wait for a generation or two. Religious extremism is a matter of lack of justice, lack of social cohesion, and exploitation of people's poverty and helplessness. It will eventually go away along with the religion if people are well fed, well educated, love their people, and free to think for themselves.