Why not invite these activists to present their evidence in a responsible and respectful manner backed up by science to make the case that there is no male or female and let peer review decide the case. /s
They would present their evidence in a responsible and respectful manner backed up either by science or terror. The terror approach (threat of physical violence) worked to get the American Psychiatric Association to remove homosexuality from their manual of personality disorders (DSM-3, IIRC). They learned what works from that.