Was it explicit that the daughter was post-bas-mitzvah age? Little girls come into the men’s section pretty commonly in Orthodox shuls.
Either way, he was probably just using her as a sob story to bash Orthodoxy. He can say whatever he wants, and if you defend your beliefs you might as well be Jewish ISIS. It’s a societal problem, not a personal one.
By the way, everything Joseph has said here is true and shouldn’t be controversial on a frum site. The lengths to which some of you have gone to disagree with him on this thread is borderline kefira at best.