Ask that family how they feel about Pope Benedict.
People find other human beings unacceptable (and some even "despise" others, you're right) all the time. Homosexuals have no room to wiggle in this area as victims of a judgemental world, given their adament hatred to and about so many others, other beliefs.
You've described learned behaviors among family group/s. A male child learning to chose submissive, "more feminine" behaviors almost certainly because he found some communicative and affectionate reward in doing so.
It's behavioral. As to social acceptance, the world of human behaviors can be a rough place. Most people are regarded well who regard others well, in my experience. But, regarding bad behaviors as being well and unacceptable conditions as being acceptable is a betrayal of personal ethics.
You've described learned behaviors among family group/s. A male child learning to chose submissive, "more feminine" behaviors almost certainly because he found some communicative and affectionate reward in doing so.
So, "feminine behaviors" are a result of positive reinforcement, as in learned behaviors? Men and women aren't different to start with and are merely socialized differently? Might be that you've reduced your argument to the point that it has become meaningless. It's just not that simple.