Shorten condemns Hizb ut-Tahrir views

Opposition Leader Bill Shorten says he was angered by the failure of a prominent member of radical Islamic group Hizb ut-Tahrir to condemn beheadings by Islamic State.

In a heated interview on the ABC on Wednesday, Hizb ut-Tahrir spokesman Wassim Doureihi sidestepped questions about IS tactics and refused to condemn murders and beheadings.

Mr Shorten said the interview angered him.

"I couldn't believe that I didn't hear an immediate repudiation of the violence and the beheadings and some of the dreadful images which we've seen," Mr Shorten told reporters in Melbourne on Thursday.

"I do share with the prime minister his concerns about this.

"There was very straightforward answers to give to these questions and we didn't hear them."

Tony Abbott has labelled the group Hizb ut-Tahrir "un-Islamic" and "un-Australian" following the interview.

The prime minister said the group was careful to avoid advocating terrorism but often made excuses for terrorist organisations.

"Hizb ut-Tahrir is an organisation with an ideology which justifies terrorism and that's why I say it's un-Australian," he told Fairfax Radio on Thursday.

"It's also un-Islamic, because no respectable Muslim should have these views."

Mr Doureihi accused Australian and other western governments of being complicit in the killings of millions of Muslims as a result of foreign policies.

He said western politicians were using IS as the "latest bogeyman".

Mr Abbott said he hoped Mr Doureihi, who is Australian, would "wake up to himself".