You have a good question. I agree, gays are born that way. Humans were not created that way, so why are many people gay? Also, the term sin means, "falling short of the mark." So what happened...if God did not make people gay, why are they?
As a teacher of the scriptures, I have studied the gay sin. Religions hide many things. Those religions that do, are not from God. What took place in the Garden between, Adam, the women, and Satan, changed human DNA. Genesis 3"15 is the key to understanding why we age, die, and why some are gay. Let me assure you, yes the gay life is a falling short of the mark, like all other sins. God will not kill you for being a sinner...we are all sinners.
Genesis is written in Hebrew. One word in Genesis is not. That word is found in Genesis 3:15...it is the word seed. That word is written in the Greek. It means SPERM. God is asking Satan about what he did with his sperm. Satan was an angel if he took on a form to have sex with a human, his DNA would not be human. It is thought that Cain, and Able were born just hours apart, but each had a different father. Satan being the father of Cain. Thus a DNA not 100% human was injected into the human race...giving humans more of an animal DNA. Animals always aged, and died...thus we die. Gay is an animal thing. You can Google, "homosexuality in animals," and find it is normal for many of them. Some even stay together for life.
You will not die at Gods hand for being born gay. All sinners, which is all of us, will be given 1,000 years under the rule of Gods son Jesus to grow into humans like Adam was created. You are no more of a sinner, than any other sinner. We are all sinners, none is any less than the other.
I understand what I have said happened in the garden is very different from what most religions teach...but the bible is very different from what most religions teach. Read Genesis 5. Here you will see the first child listed as Adams son is Seth. Seth means replacement. ( for Able.) Take note: If Cain was Adams son, he would have been listed there.
I hope this helps you understand that God is not the monster Satan has tried to make him look. Also, it is easy to prove all religions are false, and tools of Satan. God is real, and has left his written word for us.