My husband has a lot of gay cousins. In one family all three children are turned out Gay, one girl and two boys. They are all well respected professionals, but it was not easy, their father never accepted their homosexuality and I think that their mother died before anyone knew. I went to his funeral and all three kids, adults by that time, stood up and told how they loved their father, but did not like him because of his attitude toward homosexuality and all the pain that he caused them. I have never seen anything like it.
I don’t think the father caused them pain, they brought their pain on themselves by insisting people accept their choice to engage in homosexual behavior. The problem was their inability to accept he did not agree with them. It was their attitude not his.