From what I've read, it seems once Islam becomes the majority religion/political party, things begin to deteriorate for Christians and Jews within that society.
Historically inaccurate.
"Political party" may be the key descriptor here.
Pays to remember that the militant of Islam was dead asleep and the Arab states were in decided decline until the "arc of radical Islam" envisioned by the communists was effected ... primarily with the help of the organizing principle that was Israel (confected by useless idiot Westerners bent on their own self-interest as pressured -- as always -- by Soviet-sponsored terrorists).
"Agnostics" have killed quite a few more innocents in the search for Utopia than the religious types...