I really don't think that is besides the point. Your analogy only holds if the only issue at hand was anti-sodomy laws. But we're also concerned about protected

I really don't think that is besides the point. Your analogy only holds if the only issue at hand was anti-sodomy laws. But we're also concerned about protected rights and lessening discrimination against gay people who don't have any gay sex. There may be individuals biologically inclined to commit murder, but they still don't have to. Gay people have no autonomy at all in choosing their sexual orientation. Even if you had a direct mandate from god that engaging in homosexual behavior was immoral, it would be unethical to punish someone for the way they were born. Punishing psychopaths for murdering people might have a weak argument against it, but it still seems reasonable under most legal/civic/ethical frameworks.