"For whoever shall keep the whole law, and yet stumble in one point, he is guilty of all." - the guy who wrote James 2:10
"And if your right hand causes you to sin, cut it off and cast it from you; for it is more profitable for you that one of your members perish, than for your whole body to be cast into hell." -- Matthew 5:30Perhaps that is exactly what Alan has done by casting his daughter out of the household.
I guess we're all "guilty of it all", then. Unless you've uncovered a perfect non-sinner somewhere.