Australian senator Fraser Anning was blasted in parliament over his comments following the Christchurch terror attack.
Anning tried to use his parliament's question time to ask the Australian government about its response to a teenager that cracked an egg on his head.
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But acting government senate leader Simon Birmingham lashed out at Anning, backing Australian Prime Minister Scott Morrison's call for the senator to be punished for his physical retaliation to the egging.
Birmingham went further, slamming Anning's behaviour in the aftermath of the shooting.
"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."
Fifty people were killed when a gunman opened fire inside the Linwood Ave and Deans Ave mosques on Friday, March 15.
The attack has been labelled as terrorism and an act of right-wing extremism, but Anning said the real cause was Muslim migration to New Zealand.
"Does anyone still dispute the link between Muslim immigration and violence?" he tweeted, to widespread disgust.
"The real cause of bloodshed on New Zealand streets today is the immigration programme that allowed Muslim fanatics to migrate to New Zealand in the first place," he later said in a statement.
Teenager Will "Eggboy" Connolly smashed an egg over the 69-year-old's head for the comments, which the boy admits was not the right thing to do.
Anning attacked the boy as soon as the egg hit his head and has been angry at the boy ever since.
On Wednesday he was trying to ask the government whether politically-motivated violence was acceptable in some circumstances, referring to the egging.
Birmingham was having none of it and said Anning was making an "appalling comparison" by linking the egging with his own comments.
He said Anning will face a censure motion on Thursday.
"You have failed the test of character I would expect of anybody who is elected to this place."