The exhibition by Mercy Pictures gallery closed last week, but has come under intense scrutiny by locals and activist group Tāmaki Anti-Fascist Action who believe the display, which did not include context or justification, was deeply hurtful.
In a statement, a spokesperson for the group said many of the images used were clearly symbols of oppression, disguised as art.
"We were profoundly troubled by its extensive and uncritical use of neo-Nazi symbols, which is a form of platforming their ideology. We've found this especially frustrating when we and other community groups have put in so much effort to deplatform fascists before and following the Christchurch massacre," they said.
"In addition, we were deeply concerned that the exhibition's introduction was written by British transphobe Nina Power who has also collaborated with the alt-right, as a form of platforming her transphobic and alt-right ideology."
The group was also concerned that neo-Nazi symbols were displayed alongside the Tino Rangatiratanga and Ngāi Tūhoe flags, without permission from tangata whenua.
"I would like to sincerely apologise for the harm and re-traumatisation brought about by the exhibition I played a part in putting together ... I deeply regret the way Mercy Pictures has responded to criticism and the pain that this show has bought about. It was irresponsible of me to assume these symbols and our action in displaying could deny their meanings and histories to extended communities," he said in an open letter.
"I regret in the strongest way possible the display of images and symbols related to terrible violence inflicted upon marginalised communities in the name of art. I recognise now this was a form of platforming fascist symbols. I apologise whole-heartedly for any detraction from the strength, mana and resilience of those people and for any pain that the exhibition caused them."
He also acknowledged that he would not work with Nina Power in the future, and said he would meet with the communities he had harmed face-to-face.
An open letter is circulating online to condemn the exhibition, and demand an apology from the entire company.
The letter also calls for the company to refuse to work with Nina Power in the future, no longer platform fascist and other far-right figures, and to apologise to tangata whenua for displaying their flags without permission.
Mercy Pictures is expected to release a statement.