So you're saying because he was raised by two gay parents he was not raised correctly due to his belief that being gay is "ok."
I've been raised by a mom and dad, i have a brother and sister who were both raised the same way as me and are now 24 and 20 respectively. We have no anger towards, gays, and we believe it is perfectly fine. My sister's best friends are gay, she doesn't believe it's wrong and neither do I. It is in fact, perfectly normal. Maybe not by your standards, but by my families and I.