This academic paper on cousin marriage is fascinating. One major feature of Islamic culture, even in non-Arabic countries, is the high degree of cousin marriages.
The natural outgrowth of that familial interdependency is autocratic government, laws without teeth, and government by favor, rather than right.
That's not compatible with the American value of government by rules and laws. That framework does, it is true, sometimes leave individuals with little recourse against harmful government actions - or lack of action. However, the alternative, in which pressure groups are the only way to direct an outcome also disadvantages some.
There is no perfect government. There are no perfect people. All are flawed.
However, government by rule and law has a MAJOR advantage - it is codified and predictable, thus giving a roadmap for action.