Moral superiority: Seculars vs Religious

[Dystopia]

So I was reading "Non-believer Nation" and the writer brought up a number of very good points about the correlation in national population percentages between secularity and religiosity in regards to crime. I knew about the studies in the US, but apparently it's not just in the US; the higher the ratios of secular individuals to religious individuals, the lower the rate of violent crimes, particularly murder and sexual assault.

This strengthens my personal idea that religion could be directly or indirectly considered the cause of most of current world issues human societies face, in the west or everywhere else. Not necessarily one religion or religious institutions, but ideas and actions people have that have their origin rooted in religious principles. To give just one example, Creed, why do you think humans are so taboo when it comes to problems like sex working, human sexuality, prostitution, homosexuality, pre-marital sex, "promiscuous behaviour"...? I'm using the case of sexuality because it allows for an easy explanation of my idea, and it is obvious that the reason we despise discussing human sexuality (on a very broad sense) and solving the issues associated with it (namely an effective rape prevention policy - One that knows rape is mostly caused by social and cultural variables and not "biology"...) is because of religious principles and the idea that humans should be pure and procreation is the only reason for sex. Of course that with time people stop seeing sex as only for procreation, but they still hold a monocultural strict view of how sexuality should exist and work - Now we recognize that gays can marry and people can have sex before marriage, but we still think prostitution is a "sin" and an "immoral" job and that having to much sex partners is universally an "undesirable trait"... What do you think [I'm talking to you Creed] [The word "we" is a reference to human societies]

If one says that "good wholesome Christian values" are a good strong moral backing, how does one explain how the less a national population adheres to those values, the lower the crime rates are?

If it went the other way around, that the more secularization of a population, the more violent the society, I personally would find myself hard-pressed to explain it other than to say "religion must provide peace of mind and culture," but such is not the case.

I think what a theist would reply here is that regardless of crime statistics that doesn't prove god exists or not, and I am of the same opinion - Secularism is correlated with less criminality and better standards of living, however I don't think any of that, regarding the god hypothesis, proves god is wrong - He could as well be an evil sick bastard.