OK then:
Do not allow expats to live or work or visit in Islamic countries

Ban access to the internet and books and news and any form of telecommunication where people might be exposed to decadent "Western" values and immorality or ideas

Prohibit marriage across cultures

Prohibit access to any medical or educational facilities or treatment that are not invented by and provided by believers.

That way it won't be necessary to worry about Western influences.

"you can't fix stupid"