Only around 30 supporters of the controversial white nationalist made it into the University of Florida auditorium, massively outnumbered by protesters who chanted “No more Spencer!”

Spencer has gained notoriety as a leader of the “alt-right” movement, a loose collection of white supremacist and neo-Nazi groups that staged the incendiary protest in Charlottesville, Virginia in August.

A 32-year-old woman was killed when a Nazi sympathiser ploughed his car into counter-protesters, and two police officers died in a helicopter crash as they were responding to the violence.

As he stepped onto the stage, Spencer was greeted with a chorus of angry and profanity-laced jeers and chants, drowning out his voice.

“This is a great greeting,” he said. “Thank you for the welcome. Are you ready to talk?”

People stood up, raising their right hands into fists and chanting “No more Spencer! No more Spencer!”

“Are you gonna keep this up the whole night?” Spencer said, describing himself as a “dissident intellectual.”

“You sent your message! Why don’t we have a conversation?” said the 39-year-old. “So you don’t believe in free speech at all, do you?”

“You are cowardly trying to shut down a movement that is growing and it’s going to stand up for white people,” Spencer yelled at the crowd.

In Gainesville, streets surrounding the University of Florida were blocked off to traffic on Thursday, and classes were cancelled at the Philips Centre, where the Spencer attempted to speak.

Authorities barred people inside and near the site from carrying a long list of items, including shields, umbrellas, water bottles and backpacks.

Protesters opposed to Spencer’s arrival unfurled signs on several campus buildings that read “Love, not hate.” Chalk markings on concrete walkways carried messages supporting diversity.

But the tensions turned violent when a skinhead wearing a shirt emblazoned with swastikas was punched in the face as he made his way towards the auditorium.

Under the hashtag #TogetherUF, student leaders called for an online “virtual assembly” to counter people arriving to hear Spencer’s speech.

“We want to take the spotlight away from the controversial speaker and make headlines with the amazing things our diverse student body does together,” said one of the organisers, student Bijal Desai.

Spencer is “one of the leaders of the white nationalist movement and he coined the expression ‘the alt-right’ so he has a lot of influence,” said Lecia Brooks, outreach director for the Southern Poverty Law Centre, an NGO that monitors hate groups.

The SPLC considers Spencer’s group, the National Policy Institute, to be a hate group.

Fearing a repeat of the Charlottesville violence, Scott had issued an emergency declaration for the whole of Alachua county, where Gainesville, population 130,000, is located.

“We live in a country where everyone has the right to voice their opinion. However, we have zero tolerance for violence and public safety is always our number one priority,” Scott said, adding that local authorities had asked for help.

The University of Florida agreed to host Spencer in the name of free speech, but said he was not invited to give the talk.

Spencer’s group paid US$10,564 to rent the space on campus, but the school will have to pay as much as US$500,000 for the boost to campus security.