The Times September 17, 1994, Saturday David Sinclair SINEAD O'CONNOR Universal Mother Ensign 8 30549* THE tendency for pop stars to parade their socially maladjusted backgrounds as a validation of their art may have reached its apogee with the American grunge bands, but Sinead O'Connor was way ahead of the game. Having chronicled the misery of her own dysfunctional family life for many years, she casts the net much wider on Universal Mother, embracing the distress of her entire island nation ''I see the IrishAs a race like a childThat got itself bashed in the face'' and indeed, on ''All Babies'', the pain of each individual the whole world over. Her singing ranges from a little-girl-lost whisper, as on a pecularly affecting version of Kurt Cobain's ''All Apologies'', to the tortured wail of ''Fire On Babylon''. But her best shot on this rather exhausting collection is ''Famine'', a rap on the unpromising subject of the Irish potato famine of 1845-47 intercut with snatches from the chorus of the Beatles' ''Eleanor Rigby''. ''We're suffering from post-traumatic stress disorder,'' she proclaims against a grumbling hip-hop bass riff. Well, it is one way of breaking free of the old moonJune routine.