Senator Fraser Anning has been excoriated in parliament, with a senior cabinet minister savaging him for lacking basic humanity after the Christchurch mosque massacres.
The Queenslander used Senate Question Time to quiz the government about its response to a teenager cracking an egg on his head which prompted physical retaliation from the 69-year-old.
Acting government Senate leader Simon Birmingham delivered a brutal take-down of Senator Anning, backing Prime Minister Scott Morrison's comments that he should face the full face of the law for lashing out at the boy.
"The way you have conducted yourself in the time since betrays the rights you have to freedom of speech," Senator Birmingham said.
"The lack of compassion you have shown demonstrates, frankly, a basic lack of basic humanity."
Australian man Brenton Tarrant has been charged with murder after 50 people were shot dead at Christchurch mosques a little more than two weeks ago.
After the right-wing extremist's attacks, Senator Anning said the real cause of the bloodshed was an immigration program which allowed Muslim fanatics to migrate to New Zealand.
On Tuesday, he asked whether the government believed politically-motivated violence was acceptable in some circumstances, referencing the egg incident.
Senator Birmingham said Senator Anning had acted in a way that would potentially fuel more acts of terrorism and violence.
"You have failed the test of character I would expect of anybody who is elected to this place."
The cabinet minister said Senator Anning had made an "appalling comparison" by comparing the egging to his own comments.
He said senators would deal with his actions through a censure motion on Wednesday, which has support across the parliament.
"We also trust that the people of Queensland will deal with you as you deserve to be dealt with at the next election," Senator Birmingham said.
