Mariah is being a very unaccepting about it
I feel Mariah is being very bitchy about her announcement and her mother´s reaction (well, what else is new, right). As a matter of fact, I see this quite often in young people that come out to their families. Come on, you have had months, maybe even years to think about it, process, realize what you think about yourself being gay and how you feel about it. Then you come out and you expect your parents to cope in a milisecond and be nothing but supportive? It is a learning curve for them as well, and they have right to be confused, say weird sh*t (like when Meri used this exact word) in the process (and I am not talking about extremes like kicking the child out, but it´s clear that´s not what we are working with here), and maybe even NOT be supportive about it. For the parents it´s a difficult thing to go through, maybe even a grieving process in a way (and it doesn´t have to be for selfish (but are they really selfish) reasons like losing their image of what your family will be, but simply the fact that their child´s way is going to be more difficult than they would like it to be, naturally).
I don´t know, it just irks me in a way, if I should ever use the connction "gay people are selfish", it would be in this sense - selfish about accepting only 100% support from parents that as a preventive move have already lived as if their child might be gay. With all the (justified!) pride movement many gay people act almost ... elitist about it in a way.
It´s JUST sex orientation, it´s not like you have cancer, right.