What your comparison misses is that the Saudis (and other fundamentalist Muslims) are first rank hypocrites. Under this “moralistic” surface they are running orgies with their multiple child-brides, butt-boys and indulge in excesses in their favorite “Babylon” Dubai and Abu Dhabi.
I just posed the academic question as to which society would fully rot out first. It is a theoretical question. Who can answer it? Saudi has a lot of hypocrisy. But we are also no saints (many Americans that is). Many think it is OK to abort a human, many think it is OK for two men to marry, many cast their vote for Satan himself, Obama, after all of the warnings.
There is no shortage of it (hypocrisy) in the US as well, such as Christian men tied up in online porn by the hundreds of thousands--reported in Christian publications themselves. Let's be frank and objective here.