most islamic arranged marriages are between close relatives
Those who don't want to read islamic-autistic content look away now.
There is actually a hierarchy of preference in cousin marriages. The most preferable is marrying the child of your mother's sister. That way you know the heritage of the person you are marrying. The next is the child of your father's sister. Then, your mother's brother's child. Then your father's brother's child.
Saudi Arabia has a horrifying amount of genetic conditions due to cousin marriage. It explains a lot, when you think about.
you believe them when they say KSA has low crime rates
Actually, the Magic Kingdom does have relatively low crime rates, for several reasons. First, Third Country Nationals (TCNs) from hellhole countries like Nigeria, Bangladesh, India, the Philippines know that if they are caught they risk, at best, imprisonment followed by expulsion from the country with virtually no chance of being allowed back in; at worst, decapitation. Those are some pretty big deterrents.
Then, women and foreigners (from First World countries) are reluctant to report crimes. In Islam, the testimony of two (I believe the number is) women equates to the testimony of one man. This is because women are unstable and emotional. It takes the testimony of four men to be believed in the case of rape / sexual assault. In places like Pakistan and Jordan, women who are the victims of rape are often held in prison
for their own safety, so they are not killed by male relatives for dishonouring the family. In some countries, women are forced to marry their rapists, to preserve the family's honour. And families will wait decades, if they have to, to kill female relatives who they feel have brought shame on the family.
Foreigners know that they, too, risk being thrown in jail if they complain of a crime against a Saudi national. Or if their Saudi business partner engages in some financial wrongdoings and then blames them. In Saudi Arabia, you often surrender your passport to your sponsor / employer, so there is no way of leaving the country ahead of the authorities.
I could go on but this post is already far too autistic.