First, I'm not here to bash or show disrespect for the beliefs of those Christians who frequent these boards. Rest assured that if anyone tried to harm your right to free speech I'd be the first to come to your defense.
I would however like the opportunity to present to you evidence that homosexuality, at least in males, is caused entirely by physiological anomalies as opposed to a choice by the practitioner to actively defy God and cleave unto the Devil.
In the 70's German researchers were attempting to discover a physiological explanation for homosexuality in men. They had observed that men born during the war years, 1939-1945, were far more prone towards homosexuality than those born before or since. They figured that very likely the stress of those years on the young mothers was a factor, so they took a bunch of pregnant female rats and put them in stressful conditions, with a control group allowed to come to term normally and stress-free.
They found that the stressed mothers produced a very high incidence of homosexual male rat offspring compared to the control group, so they set about dissecting the brains of the rodents to see if they could observe a difference. And indeed they did. There is in fact a very small part of the mammalian brain which seems to control our sexual responses. It's relative size and degree of proper development determine our male-oriented or female-oriented reactions to other mammals. The rats under stress received much less of a certain hormone during development and thus a smaller part of the brain (whatever it's called...)
To be sure, it is not merely stress alone which can cause improper development, merely the fact that the particular hormone (or whatever chemical they discovered to be at fault) was in short supply to the fetus.
It is important to stress that due to this discovery, homosexuality could almost be called a birth, perhaps not defect, but anomaly, a bit like someone might be born with an extra toe. A bit odd to the casual observer, but not something which is likely to cause the decline and fall of western civilisation (we have elected politicians to do that for us).
Note that a major American clinic blindly duplicated the work of the German scientists in the mid-90's and came to the same conclusion completely independently.
Thanks for reading - I'll endeavor to post more humanist debate topics soon.
Regards,
Dennis