Its a very good question. The existance of a gay gene is something gay lobbyists are concerned with, for Christians it makes no difference as genes have already been identified which cause disease and God's wish is for healing.
Oddly, there is no objective empirical repeatable evidence for your deity curing ANY disease
The question would then be is the gay gene to be treated like the disease? I would say from a medical point of view yes as its dysfunctional, from a Godly point of view yes as well,
I'll note that you have now alluded twice (directly) to homosexuality as a disease.
If it is caused by a physiological reason... then it can be classified as a birth defect or a mental disorder like Downe's Syndrome or any other one of that nature.
You can't equate Downe's syndrome with a "disorder" you want to label a "sin", unless you want to actually equate Downe's with homosexuality (in the same way, across the board)
Do you want to equate them across the board?
No?
Then DROP that argument like a hot rock
Similalry I find it difficult to understand how people fail to see how same sex union is dysfunctional as the function of the sexual organs is opposite sex and not same sex.
I've seen this argument before, and it's stupid.
You are NOT presenting an argument against same-sex marriage.
You are presenting an argument against same-sex SEX.
Re-read your own statement and admit it.
Which is fine, your beliefs are your beliefs.
But please get your argument straight and realize what you are actually arguing against.
You cannot argue against functionallity of sexual organs and be honest across the board. What about a man who has been physically castrated due to accident? His sexual organs are now non-existent (therefore dyfunctional).
According to your argument, he should not allowed to be married.
Or how about a man who's been "tied off"? His penis no longer functions in regard to passing sperm to the woman, therefore he has CHOSEN to be dysfunctional according to your statement, and therefore should NOT allowed to get married.
Sorry, but that's exactly your argument. I now expect you to petition a common vote to prevent such men from getting married and actually be consistent and honest in your POV.