If I had one, Under
no circumstances would I ever not love my child. And the only thing that would pain me enough to "disown" them would be if they caused direct serious harm to others through their actions. My fondest wish for my offspring would be that they grow up to give something back to this world - to make it a better place for future generations.
Being gay, athiest or muslim wouldn't bother me at all as long as they are also active Republicans and working to assist moderate interests within the Party.
If my child became a Democrat, I would not blame or disown them - I would blame myself for not raising them right.
I've had libertarian, fundy-Christian, and neo-confederate stages during my teen years, so I would probably have home that they would grow out of those. I can't imagine that any child of mine would ever hate people, hate gays, or hate the United States.
I don't use drugs or alcohol, and would hope to instill those values into my children. That being said, I would do everything that I could to help them get over their addictions - rather than exacerbate the problem by not providing them the support they would need.