On a side note I have been reading a lot about fundamentalist Islam and Wahhabism.
Wahhabism is an excellent subject to study. I would also recommend researching it's Christian alter ego "Theonomy" informally known as "Reconstructionism". Theonomists want a Christian Theocracy based on ALL Old Testament civil laws as well as their form of capital punishment (stoning and burning at the stake). Even though there are probably no more than a few hundreds of thousands in the U.S. they are deeply connected to the right wing movement and Republican party.
They are also the main influence on the homeschooling movement amongst conservative parents and they have the express purpose of indoctrinating their children into a full Theonomic view of life, not the more 'liberal' Christian Nationalism that tens of millions of Americans currently espouse.