he doesn't interrupt just her. His role is host, his role is to move the conversation about and yes he does fuck up by saying some stuff he should leave to her. However to me the evocative language used in the Facebook post suggests there is an aspect of deliberately seeking out "injustice" and being overly sensitive to it and seeing the world as a gender battle. If you're looking at the world through such a frame yo…
That said, he was insensitive at the point in question where he should have let her speak. You could sort of tell he was trying to organise and grasp the ideas in his own mind, probably in an effort to stay on top of things. A clumsy moderator moment more than ingrained sexism.
Let's not forget, she had the right to speak up and say "can I answer the question"... We all have the responsibility and option to guide things back on track if something isn't running smoothly. Don't just sit there waiting for balance to restore, or for the audience to come to rescue, do something about it.