If three generations of first-cousin marriages look like a brother-sister marriage, I wonder what that says about maybe 20 generations of first-cousin marriages among most Muslims?
” I wonder what that says about maybe 20 generations of first-cousin marriages among most Muslims?”
It says, massive amounts of birth defects, and a preponderance of idiots!
There are very high rates of infertility, particularly among males. In Iran the rate of infertility is 20% which is double to triple normal.