A small but vocal group of protesters has almost drowned out controversial Dutch politician Geert Wilders at a media conference in Perth to announce Senate candidates for the newly formed Australian Liberty Alliance.

Chanting "Say it loud, say it clear, racists are not welcome here", the handful of protesters used an amplifier to get their message across at the event, held in the fern garden at Parliament House.

Flanked by security guards, Mr Wilders turned up late to the conference after ALA candidates Debbie Robinson, Kirralee Smith and Bernard Gaynor had briefly addressed the media.

Mr Wilders, who flew into Australia at the weekend, said he had been approached by many people keen to see the establishment of a new party.

The ALA was officially launched in secret in Perth yesterday to an audience of invited party members.

"I believe that yesterday the [launch of the] new party gave Australians, millions of Australians, new hope," Mr Wilders said.

"New hope that there is a party committed to fight for freedom, for freedom of speech ... and is committed to stop the Islamisation of Australia."

He said the party was "not into political correctness" and would fight to "stop the immigration ... stop the multiculturalism".

Party wants 10-year ban on immigration from Muslim countries

Mr Wilders has previously called for a tax on the Muslim headscarf, described Islam as the "ideology of a retarded culture" and the Koran as a "fascist book" comparable to Hitler's Mein Kampf which "incites violence" and must be banned.

A protestor shouts at the Geert Wilders press conference to launch the ALA in WA. ( ABC News: Glynn Jones )

The 52-year-old leader of the Dutch Party for Freedom last night attended the ALA meeting at a secret location near Perth, where the media were not invited.

The party has pledged to "stop the Islamisation of Australia", ban full-face coverings in public spaces and introduce a 10-year moratorium on immigration from Organisation of Islamic Cooperation countries.

Mr Gaynor, the party's Queensland senate candidate, said that would include people from Indonesia, the world's largest Muslim country, which the Department of Foreign Affairs and Trade describes as one of "one of Australia's most important bilateral relationships".

"The most important thing we need to do is look after our country, and that's why that policy's there," Mr Gaynor said.

Mr Wilders today backed the moratorium and denied it was discriminatory, saying governments already selectively chose who they let into their countries.

After Mr Wilders left, one protestor tried to follow up a set of steps outside Parliament House but was blocked.

Opposition Leader Mark McGowan watched the event from a balcony and later said it was offensive the man had been stopped "by private security guards who are poking and prodding people with umbrellas".

"I don't understand why this has been allowed to happen," Mr McGowan said.

"This shouldn't happen in this country.

"I don't understand why people have any time for people from overseas who come in and try and disrupt our way of life, try and create their own private political parties in this country."