Islamic State has taken aim at several Australian religious scholars in its latest propaganda video, calling on followers to kill the sheikhs because they discourage violence.

Youth leader Sheikh Shady Alsuleiman, NSW Police Force chaplain Sheikh Ahmed Abdo and the Grand Mufti of Australia, Ibrahim Abu Mohamed, have been branded "collaborators, informers and apostates" in the 25-minute video titled Fight the leaders of disbelief.

Sheikh Shady Alsuleiman is featured in the Islamic State video giving a sermon in which he dismantles the idea that violent extremism will get a person to heaven.

The video, which mentions several Muslim clerics from around the world, is a chilling and unprecedented escalation on previous calls to boycott leaders who work with governments, police and leaders of other faiths.

The terrorist group also condemns clerics from Egypt, Saudi Arabia and other Middle Eastern states, who are seen to be collaborating with the regimes of those states.