But consider this, MT...
Suppose there can be a genetic link made to homosexuality. What difference does it make?
Bear with me. People are disposed to do many things, whether it's something as benign as anal retentive behavior, or anti-social as murder. The truth is, science will probably find a genetic cause for just about every behavior we have.
So?
Simple- nothing is ever anyone's fault or responsibility. By claiming genetic cause, we get the "Get out of jail free" card. How can we persecute someone for something they didn't do? Morality then becomes irrelevant and unenforceable. "Yeah, he murders people, but you know, he was born with that extra DNA. What are you gonna do?"
Crowd: "I can't believe you are comparing homosexuals to murderers!"
Me: "I'm not. But don't kid yourselves into thinking this argument won't be applied to any behavior considered to be outside the mainstream."
It may very well be we are all hard-coded with a genetic weakness- Paul himself complained of "a thorn in my side". What that thorn was is open to debate, but for all we know it could have been homosexuality. What we do know is he did not succumb to it, whatever it was.
Whatever the case, if you are a Christian, and if you believe the Bible, there is only one way to read God's take on homosexuality, whatever the cause.