Ok so i attempted to fix my passive sentences and make them active so here are the corrected ones :

Original: In our society today, gay marriage is considered an abomination; a sin against God, but for a gay couple to adopt a child would be down right insane.
Corrected: In our society, gay marriage is an abomination; a sin against God, but for a gay couple to adopt a child is down right insane.

Original: Many parents this day and age have become lazy in the aspects of raising their offspring.
Corrected: Many parents this day and age are lazy in the aspects of raising their offspring.

Original: Adding on to the lack of manners and social conduct is the fact that these kids have been taught what is “supposedly” socially wrong and volatile; including the act of being homosexual.
Corrected: Adding on to the lack of manners and social conduct is the fact that these kids are taught what is “supposedly” socially wrong and volatile; including the act of being homosexual.

Original: Studies have shown that most of the children raised by gay parents have been healthier and happier in both everyday and home life.
Corrected: Studies show that most of the children raised by gay parents have been healthier and happier in both everyday and home life.

Original: These children are heterosexuals and have not been affected by their parent situation.
Corrected: These children are heterosexuals having not been affected by their parent situation.

Hope i did it right thanks!