Greens Leader Christine Milne says it's about time federal funds started flowing for deradicalisation programs in Australian communities.

"It has been almost eight months since Australians were first sent off to another unwinnable war in the Middle East, but only now is the Abbott government starting to act on countering violent extremism at home," said Senator Milne.

Greens Leader Christine Milne says that Daesh is running a sophisticated propaganda campaign and the Prime Minister's response is inadequate.

"Where are the prevention programs Mr Abbott?" Greens Leader Christine Milne said.

"This propaganda is sophisticated and appealing to hearts and minds.

"It's not enough for the Prime Minister to just stand there with his eight flags and say "don't do it". That won't work. It a recipe for complete failure.

Prime Minister Tony Abbott is trying to shore up his leadership by scaring the community and pressing the terror button, says Australian Greens Leader Christine Milne.

"We've got a Prime Minister who is so desperate that he is trying to press the terror button in order to shore up his own position. It won't make us safer," Senator Milne said.

"He's fanning flames of fear, anxiety, difference and division, because it's about the only thing that can distract from those same problems within his own party.

"Real leadership will bring people together, not divide them.

The Australian Greens are pushing for a comprehensive plan to strengthen Australian society and help make all Australians safer at home, announcing legislation to establish an independent national body to build social cohesion and prevent extremism. The Australian Centre for Social Cohesion (ACSC) would be tasked with overseeing the development and implementation of key preventative programs that combat social exclusion and stop young Australians from becoming radicalised.

Greens Leader Christine Milne has called on Australians to stand together against terrorism threats on home soil, saying unity, not war, will deliver lasting peace.

"The best way to keep Australians safe is to bring them together, not blindly follow the US into an unwinnable war in the Middle East," said Senator Milne.

"Are we going to another war in the Middle East because the terror alert has been raised, or the other way around?

Australian Greens Leader Christine Milne says Tony Abbott should level with the men and women of Australia's Defence Force when he farewells them tomorrow on an open-ended mission to Iraq.

"When you ask young men and women to put their lives on the line, you should be honest enough to tell them that you're committing them to war," said Senator Milne.

"This has been mission creep from the start. Australia is getting itself into an open-ended war.

The Australian Greens accept the advice of ASIO on threats to Australia but say we cannot ignore the impact of military engagement in Iraq and the Middle East in increasing the risk at home. Back in 2004, Federal Police Commissioner Mick Keelty said Australia was at increased risk because of our involvement in the Iraq war, and Greens Leader Christine Milne says the same applies now.

"We cannot bring Australians together and combat extremism at home by blindly following the USA into yet another Iraq war," said Senator Milne.