They all happen to have the same religion (or more accurately, it's the dominant religion of the populace in all those countries), and they base the stupid law off their religion. I don't care about their religion though. As far as I know they don't do this crap in Jordan and they are heavily Muslim. Saudi Arabia happens to be one of the worst countries for this.
I honestly hate Southeast Asian countries and their crappy civil rights too (the Singapores and Malaysias and such) and it's all cultural and not a religious thing at all.
I, being from Jordan, disagree with this view. They're not nearly as backward as Saudi Arabia, but they still have Muslim-inspired "honor" based mentality where killing one's relative for having extramarital affairs will probably land you in prison for a few months. Hell, my own cousin killed 7 people in a car accident while driving drunk. And his rich family just paid the survivors off to drop the charges, because you're allowed to do that in Islamic law.
Trust me, Islam ****s on every country it touches. Even the relatively enlightened Turkey.