I'm chiming in a bit late, I think. And I admit I haven't read all the posts because there just isn't time, and I hope I haven't offended anyone.
I was married twice, for over 2 decades. I have been attracted to both men and women since I can remember. My father abused the hell out of me. In my mid 40's I was diagnosed bipolar with a boat load of other fun things. To this day no one can clearly tell me whether the severe abuse drove me nuts, finally settling into bipolar syndrome, nor can anyone tell me that I am bisexual for the same reasons.
But whatever the reasons are, this IS who I am. I get to deal with the whole boatload regardless of hateful conservative Christians, and any other fag-hating religion. (Which, from what I understand, includes all of them.)
So my take is screw the articles about what causes it. Screw the articles about the causes and effects of mental illness. There are NO clear answers that I can determine and I've read library of books on abuse, recovery, homosexuality, bipolar and mental illness.
I am level now, more often than not. I am happier than I have ever known. My kids adore me and I adore them, and my lover makes my life as complete as I make his.
I think that until we walk in each other's shoes a while, we cannot judge, and although the articles was not taking a judgmental view, I think answers to some things can't be known at this point in the earth's history.
So my take is I believe we should all stop being zealots with a cause and try to get along, become of accepting of the good in the people around us, and for those people who truly aren't good, round them up and make them live with each other.