British politician Nigel Farage has denied he is spruiking a racist message during his Australian tour, but says immigration should be discussed.

Key points: Nigel Farage says his position on immigration is not related to race

Nigel Farage says his position on immigration is not related to race He says Australian leaders need to connect with those who want patriotic values

He says Australian leaders need to connect with those who want patriotic values Farage praises performance of US President Donald Trump

His supporters have been heckled and called Nazis by protesters outside venues where the pro-Brexit campaigner is speaking.

But Mr Farage told the ABC's The World program he has never encouraged racism in any way.

"I'm sorry, I am telling the hard right all over Europe, in America, and I'll do it here in Australia, that the last thing we need to do is go to war against the entire Muslim religion," he said.

"When I fought that referendum in 2016 on Brexit, actually it was white immigration that was the real debate, it was the huge numbers of people coming from Eastern Europe.

"So the issue of race had absolutely nothing to do with it, it was an issue about numbers."

Mr Farage is on a week-long speaking tour in Australia and New Zealand. ( AAP: Richard Wainwright )

Mr Farage said the UK was facing the same issues as Australia when it came to the increasing pressure on systems like public transport and healthcare.

"We need to openly and honestly discuss immigration, discuss numbers, and yes, discuss culture and our Judaeo-Christian values, which underpin our entire society," he said.

"Now if there are one or two on the extreme right who see what I'm saying as encouragement, well they've got it wrong."

Farage's warning to Liberal Party

Nigel Farage warns a "global revolution" is coming. ( Reuters: Clodagh Kilcoyne )

Mr Farage, a former leader of the right-wing UK Independence Party (UKIP), is on a week-long speaking tour of Australia and New Zealand.

"My message is, that the global revolution of 2016, which you saw in the shape of Trump being elected and of course Brexit … I'm coming to tell people, far from it being a short-term blip, it's actually part of a global revolution," he told the ABC.

"It's going to sweep out across the whole of the rest of Europe.

"If in Australia there is not a greater connection with those who actually want patriotic values, for those who think that immigration needs looking at, for those who are really worried about energy prices, if the Liberal Party can't sort itself out, then something, a big shock will come along and replace it."

The former businessman said the Brexit vote and Donald Trump's election in the US were proof that it was time for countries like Australia to listen to those in the "middle".

"The Washington beltway was not connecting with middle America, just as Westminster on Brexit wasn't connecting with middle England," he said.

"What Trump has done is to give those people a voice."

Nigel Farage has a close relationship with US President Donald Trump. ( Twitter: Nigel Farage )

Mr Farage has a close relationship with the American President and met Mr Trump before any EU leaders after the Republican's November 2016 election win.

He defended the Trump administration's performance and said America was now on the right track.

"I'd remind you that growth in America is now running at 4.1 per cent, that unarguably America's standing in the world is much greater than it was under the years of drift with president Obama," Mr Farage said.

"And here's the interesting bit, if you look at the popularity ratings of Western leaders, Trump is miles ahead of the Merkels, the Macrons, and the Mrs Mays, so Trump actually is doing very, very well."

Former UKIP leader unimpressed with 'Theresa the appeaser'

Mr Farage was one of the key supporters of the campaign for the UK to leave the EU.

Nigel Farage calls the British Prime Minister 'Theresa the appeaser'. ( Reuters: Kevin Lamarque )

But he said he was concerned with the direction of Brexit and agreed negotiations on the British side were chaotic.

"I think that's a very fair criticism, our Prime Minister [Theresa May] had actually been a remainer during the campaign so it was quite a shock when she became the PM," Mr Farage said.

"I've been calling her 'Theresa the appeaser' … if you asked me now what actually today is the UK's position, I can't answer it."

Mr Farage, who remains a Member of the European Parliament (MEP), said he planned to continue pressuring British MPs "to give us the Brexit that we voted for".

Watch the full interview with Nigel Farage tonight on The World at 10:00pm AEST on the ABC News Channel.