AUSTRALIAN Prime Minister Tony Abbott announced yesterday that his conservative government will strengthen its immigration laws and crack down on groups that incite hatred under a new raft of counterterrorism measures.

He unveiled his new anti-extremism strategy following the release of a government review into December’s deadly siege at a cafe in Sydney’s busy Martin Place plaza.

The government review found no major faults with multiple agencies that failed to detect hostage-taker Man Monis was a threat, despite the fact that he was out on bail on sexual assault and accessory to murder charges.

However, Mr Abbott said that Mr Monis should never have been allowed into Australia, should not have been out on bail and should not have been able to get a gun.

“It’s clear that in too many instances, the threshold for action was set too high and that the only beneficiary of that was the Martin Place murderer himself,” he said.