1. to marry cousin is genetic madness...
2. a father should never decide about such things. Children dont know in that age whats good for them. If she or he fall in love with someone else so be it.
You are wrong. Incest is incest no matter what religion. Biology doesnt care for religion.
You do know how DNA works? Evry DNA strang has failures. But only when two DNA parts that combine into a new one have the same mistake, that mistake becomes reality.
Chances are much higher that two damages DNA parts fuse when relatives have children. The closr the relatives, the higher the chances for damaged kids. You create a genetic bottle neck. Is evry child weak and sick from such a couple? no. But chances are much higher.
To marry cousin is seen as disgusting in italy and most other european nations.
My fe female cousins are like my sisters for me. We played as kids. We party and have fun and the pure thought for me to have kids with one of them is so repulsive.
Its something you just dont do.