Not per Capita......Well, we certainly have many examples of hetero humans killing or sexually abusing their young. Primarily heterosexual FATHERS.Biologically all mammals have instances of eating their young too.Defect isn't the right word. Many straight people make poor and even horrible parents. I wonder if you'd call them defective. Biologically, all mammals have instances of same sex couples. Biologically speaking, they could exist to pick up the parenting slack.Gay men are still men. Gay women are still women.
And biology still dictates that men are created to mate with women. Not men with men, not women with women. Homosexuality is a biological defect, not a normal, proper condition.
Why is this so important to you though? I never have understood this fear of gay people.