That's not true. Life is full of choices. He made one. There are others.
No one here is qualified to judge his actions right or wrong. But there are other choices, and I personally would have made a different one.
I personally don't see any other option how a father honors his relationship with his Lord and Savior while at the same time tolerates a defiant lesbian daughter who proclaims that relationship a mockery by her public embrace of perversion. The Bible is clear, you can't compromise your values for the sake of a defiant sinner even if it's family.
It sounds like Keyes apparently tried to deal with her lesbianism differently privately but once he realized she was committed to the lifestyle by her outing herself then he was forced to deal with her the way you must deal with the homo agenda.
She could've indulged in her perversion quietly, why do you think she felt the need to proclaim herself in the public arena, she must've known it would cause a ruckus like this on freerepublic and elsewhere.