The New Zealand Initiative says anti-Semitic and anti-Muslim comments in a blog written by one of its staff members are abhorrent and is seeking legal advice about what to do next.
Nathan Smith, who works as chief editor at the free market lobby group, is on leave pending an investigation.
The group's executive director Oliver Hartwich says he is shocked at the views, which include allegations that the extent of the Covid-19 pandemic has been exaggerated.
He spoke to Māni Dunlop.