 In the aftermath of the Cronulla riot, this week s Speaking in Tongues gets controversial: Scientist Gerard Tarulli uses genetics to explain why we re all basically the same; Macquarie s Public Law academic Andrew Fraser calls for the return of the White Australia Policy; and in our matchmaking segment, Ibrahim Al-Sabahi, Mandaean and former asylum seeker, tells us what he s looking for in a Mandaean girl.