A South African man who attended a Neo-Nazi protest in Sydney has been taken to a detention centre as the federal home affairs minister anticipates "he'll be gone pretty soon".

Matthew Gruter's visa was revoked by the federal government this week after he was photographed at the front of the gathering, organised by the National Socialist Network (NSN).

The protest on November 8 was held outside NSW parliament and featured two rows of men clad in black, displaying a banner calling to "Abolish the Jewish lobby".

The group of about 60 also repeatedly chanted the slogan associated with the Hitler Youth, "blood and honour".

Mr Gruter was identified as one of the attendees by ABC Verify in the days following the protest, but when contacted, he denied being there.

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