If as a society, we accept homosexuality, then naturally, we must afford all individuals with equal rights and privileges, regardless if they freely choose a gay lifestyle or if they are compelled by genetic disposition. So why do we continue to avoid answering the fundamental question in favor of the question of genetics?
The enemy is the same ignorance and hate that leads to transphobia, racism and misogyny. It's the same ignorance that causes us to jump to defend our mistakes, rather than attempt to understand why or how we could be wrong. It's the same hate that drives people to inexplicably murder another person they deem as other, or wrong, or perverted, or less-than.