"If" my parents didn't exist I wouldn't have been born. Any reason why your ifs should matter? You can find justifications for homophobia outside religion. My dad is an atheist and he justifies it with biology, procreation and "nature".
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you