In my opinion:
Safest has to be Fairfield, Smithfield, Abbotsbury, Hoxton Park, Wetherill Park, Bossley Park and Penrith - considerable number of mild to moderate Christians/Catholics (Assyrians, Italians, Maltese) and us Atheists/Agnostics.
Unsafe: Punchbowl, Auburn, Lidcombe, Bankstown...