Thanks for that post...but I don't see where it says that you should kick them out of your house or disown them.
Parents are to discipline their children.
Proverbs: "Spare the rod and spoil the child."
That discipline comes in many forms, such as excommunication.
1 Corinthians 5:
11But now I have written to you not to keep company with anyone named a brother, who is sexually immoral, or covetous, or an idolater, or a reviler, or a drunkard, or an extortioner--not even to eat with such a person.
That is what Alan Keyes is doing. Tough love.