The government will overhaul hate speech laws in NSW following the terror attack at Parramatta police headquarters and calls from the opposition for stronger laws to clamp down on "radical preachers".

Attorney-General Gabrielle Upton said the government will strengthen and streamline racial vilification laws, defying right-wing commentators who have previously said proposed reforms were "straight out of the Leninist playbook".

Ms Upton said recent events had "reinforced the necessarily of being vigilant to and guarding against the spread of racial vilification".

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