Her response to this helps to confirm a point I've made previously. It is difficult for left-liberals to take seriously the issue of whites facing decline, because according to their world view whites are a powerful, privileged group. How can she sympathise with the plight of whites when she views us this way?
Before a mass panic ensues, it should be kept in mind that white privilege is so institutionalised, it would take more than a dip in numbers to overturn it. That, however, doesn't do much to stem the tide of the fear at being outnumbered.
There is a triumph of ideology over reality here. In her ideology, whites are uniquely bad in having created a system to gain an unearned privilege over other groups. Whites, in other words, have a systemic advantage over everyone else.
The whole system is set up for us, she thinks, so it doesn't matter if we are reduced to minorities, as we will remain the powerful, privileged group in society.