I have heard arguments that homosexuality is hereditary and even contagious. All of these suggestions are plausible, but whether nature or nurture, certain forms of behavior that are contrary to the interests of society should not be encouraged. I'm sure that even people like you would agree with that.
You seem to have the idea that being homosexual prevents you from benefiting society. While homosexuality itself doesn't benefit society in any particular way, it doesn't prevent someone from benefiting it. Having a traditionally structured family is not the only way to be an asset to society.
You are free to discuss racism here, the only thing banned here is making blatantly racist statements for the sake of racism.
I have witnessed such conduct from yourself on numerous occasions. As I have observed of most of the members here, there seems to be no set standard for anyone but the new and unpopular; namely, myself.
I'm guessing most of the posts you are referring to are from the Complete Nonsense forum or one of the lower, less serious boards. Every "racist" comment that I've seen has been made in jest, while your comments appear to be genuinely sincere.