A far-right group leader encouraged supporters to send intimidating and harassing messages to a federal MP in response to her posts condemning a neo-Nazi demonstration outside NSW ParlIament.

Federal Member for Wentworth and the NSW Member for Vaucluse posted to social media platform X, denouncing the antisemitic rally by neo-Nazis in Sydney on Saturday.

Warning: This article includes violent and offensive language.

NSW Police estimate about 60 black-clad men stood in formation outside the building's Macquarie Street gates, while displaying a banner targeting "the Jewish lobby" and chanting antisemitic slogans.

Independent Wentworth MP Allegra Spender labelled the demonstration as "appalling" in a post on X.

In a message seen by the ABC, a far-right group's leader invited members of a

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