Footage posted on YouTube earlier this week shows the former EDL leader attempting to confront Quilliam senior researcher Julia Ebner after alleging that she referred to him as a white supremacist in a newspaper article.
At one point, Robinson is seen repeatedly questioning Exner while his cameraman captures the fiery exchange.
He has now defended his actions in an interview with Daily Politics, and insists that he was ‘polite’.
He told the BBC show: ‘The doors were open, I was very polite. I walked in with one cameraman and asked a simple question, bearing in mind that the lady in question had called me a white supremacist.
‘In the last two weeks I’ve had to go to four different companies’ premises who have all run headlines that are complete lies.
‘This is about working class people at home who have been pigeonholed as extremist, as racist and as far right when they’re not. They’re genuine concerns and fears.’
He added: ‘It seems that only people in that office who wear shirts and ties are allowed to have an opinion. Everyone else is an extremist.’
He also denied suggestions that he had trespassed, and instead claimed to have walked into an ‘open office.’
Quilliam has since responded to Robinson’s claims, and confirmed their official position that he is not a white supremacist.
CEO Haras Rafiq said: ‘Tommy is not a white supremacist. The Quilliam position is that Tommy is not a white supremacist.
‘The article was not meant to say he is a white supremacist. It could have been worded better.’