Are homosexual natures created by nurture, nature, or God?
I think the answer is is quite important as it would show us the cause/source of homosexuality.
If God, as believers think, then why is God creating gays?
I think there are multi answers to this question.
Firstly, I would hold the view that the Bible indicates that ALL humans are sinful. Created very good - without sin and without flaw. Yet with the capacity to both sin and disobey God. (For me this in more in accord with perfection than for a person to be created without the capacity to sin and to disobey God)
The Fall of Humanity brought sin into the world as we know it and thereafter all of creation was tainted by sin. God not being part of creation was not tainted by sin.
All humanity after Adam and Eve being their progeny were not created directly by God like Adam and Eve. Although God in his providential manner creates the means therefore of life - it was no longer created in the same sense as in the first creation. Adam and Eve were not created Gay. They were created with the desire for each other - in a monogamous relationship of marriage.
Their children however were born into the estate of sin due to the translocation of Adam and Eve from the Garden of Eden into the world. Sin impacted their children and indeed the creation around them - causing distortion everywhere. Not making everything evil - or as bad as possible - but distorted - and with sin now taking a hold and growing stronger and stronger.
Sin in that sense - became a decaying force in nature. Humans did not live as long. Humans became less and less aware and fearful of God. Humans began more and more to do whatever they liked to whomever they pleased.
This demonstrates that sin causes humanity to move away from God and further into death.
So to answer the question:
Are homosexual natures created by God, by nature or nurture?
They were not created by God. God created two people directly. Adam and Eve. Both were heterosexual.
Sinful Nature - A nature that moves away from God and does whatever it likes - may be a contributing factor of how homosexual natures were created.
Does nurture create homosexuality? I don't know.
In my view - homosexual nature was not created by God. Humanity now re-creates - not creates - everything in accordance with the sinful nature of humanity.
New humans are not being created in the same sense as when God created Adam and Eve. Now humans are born from the original creations - but the intervening even between their creation and now is the Fall.
I would say that the Fall - is a factor which needs to be understood - and factored into the the possibility that people are now born with homosexual natures.