I'd feel terrible that he gave up on eternal life, and would pray that he'd recognize the wrongness of his choice.
I can understand that people feel as you do and I'm not going to give you any grief about it. But hopefully you wouldn't let such feelings interfere with loving a family member. In my own family, several of my young nieces are gay. In one case, the girls father is a fairly strict fundamentalist who pretty much shuns her and insists that the rest of the family do so as well. He has pretty much no hope of having any influence on his daughter.
That said, there is no question in my mind that Jon Smid created tremendous hurt to some troubled people in his 'pray away' efforts. Thankfully he appreciates his error and does not do that stuff anymore.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)
I have never met a man so ignorant that I couldn't learn something from him. Galileo Galilei
If there is no struggle, there is no progress. Those who profess to favor freedom, and deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning. Frederick Douglass