I wouldn't disown my son/daughter if they decided to marry someone of a different faith. I would rather attempt to convince the non-Jewish spouse to convert, especially if the non-Jewish partner is the female. If my daughter decided to marry a non-Jew, I would convince for a conversion, and if that's not possible I would attempt to persuade them to raise the child Jewish. After all, the child WOULD be Jewish, and if a daughter can provide you a Jewish grandchild, I don't think it is justified to disown. If my child decided to be in a homosexual relationship, I would try to convince him to attempt to be straight. I believe homosexuality to be a natural inclination, and even though it is wrong and disgusting, I would never punish my child for something he was born with. I think I could live with my child's decision to marry an evil human being, but I would definitely distance myself from him/her and try to become as active in the child's life as possible. I would consider disowning my child if they married an extremely evil person, but that person would have to act on that and do horrible things to warrant that. So in certain situations I would think that a horrible, evil spouse would warrant disowning, but I chose the last option because the horrible evil one is somewhat unclear and left open to interpretation. There are some situations that I believe would warrant disowning:
1)The child becomes a self-loathing Jew, Nazi, anti-semite, or Muslim.
2) The child decided to marry a Muslim and raise his child in the Islamic faith.