Re: Cousin Marriage … Islam Allows it but…
Having too much red meat, or ghee or butter, or oily food in your diet is also very bad for you and will lead to your death from heart trouble.
Cousin marriages are the same thing. They are allowed, but if done to excess within a family for generations will lead to such complications.
Just as red meat is not banned by ijtihad etc, neither should cousin marriages. Both are clearly bad, but only if done to excess.