>>941419493 (OP)
> Prison gay and ex-gay are proof that "orientation" is fake.
This is like saying "you can get liver cancer by smoking therefore you can't naturally develop it as a non-smoker". Pants-on-head-retarded. Human biology, behaviour and attraction is extremely complex. It's not because one person can do something one way that this means all people can do it. It's also not because one way is possible, no other ways are possible.
There are some genes that affect aggression. You can either have those genes and be raised in a peaceful society - and you might still exhibit those traits or your upbringing might have caused those genes to be mostly repressed due to nothing triggering them. The same way you could have fewer genes associated with aggression, but if you're raised in a war-torn hellscape, you might become aggressive without having a genetic predisposition for aggression.
Your theory falls apart because you assume nature and nurture are mutually exclusive. They are not. At times they can eliminate each other, at times they can be a catalyst for each other and at times they have no effect on each other.