Assuming for the sake of the argument that the study is correct... I think its just natural to be more open minded when you have experienced that something different isnt inheritly bad. So maybe they try out to see if they like it, and maybe some of them do. In what way is that bad?
According to Jungle, it is bad because, well homosexuals and homosexuality is EVIL. Also because the bible says that gays should be put to death. Obviously if gays should be put to death, having kids be open minded either about being LGBT or accepting that LGBT is not necessarily something that people should be KILLED for is an issue.