What is the ruling on cutting off kinship ties due to disputes over inheritance?

The questioner did not specify the type of inheritance. If it is an inheritance from his father, it is the right of his heirs, and the paternal uncles and aunts have no share in it due to them being excluded. If it is an inheritance for his father from his grandfather or grandmother, then if the father died before the inheritor, he has no inheritance. If he died after the inheritor, then his share devolves to his sons and daughters. These issues must be resolved in the Sharia court, with the obligation of maintaining kinship ties.