Islamic Republics don’t work. The only one that has been established (not counting others that say they are but aren’t) is in Iran. The major problems were twofold. First, the radicals had too much power. Radical religious types are no fun, and you can’t argue with them because they are on a mission from God. Most people tire of this in short order. To speed this disillusionment, many of the once-poor and now-powerful religious leaders became corrupt. This eventually sends your popularity ratings straight to hell.