That's correct. I don't think there is. I would also disagree with your characterization that homosexuality is nothing more than a "behavior". Are you only heterosexual while you're having sex, or is it part of the person you are? And notwithstanding all the hysteria and chest-thumping around here, I've heard no convincing argument that there is anything harmful or destructive about it.
there is no "gay" agenda
Incorrect. There definitely is a 'gay agenda' and anyone with two eyes can see it. But that doesn't mean gays as a whole subscribe to it or necessarily support it. Nor is every gay person the flamboyant drag queen dancing on a parade float. Mostly, there's the person working in the office next to you minding their own business.
and the morality and immorality don't exist
Of course morality and immorality exist. I don't happen to consider a voluntary relationship between two adults to be immoral. I consider denigration and vitriol against your fellow human being to be immoral.