This is not the Charlottesville event. This occurred several months afterwards. Nor were those white supremacists. In fact, they were old age pensioners taking part in a Trump rally at a retirement complex in Florida. Anti-Trump protestors arrived at the scene and began shouting angrily and abusively, using the terms 'racist' and 'Nazi.' At one point in the clip, a single individual sitting in a golf cart sarcastically retorted to that abuse in clear mockery of the barrage of over-the-top insults.

The BBC News article, while clearly biased against Trump, provides enough context to read between the lines.

https://www.bbc.com/news/world-us-canada-53212685