In his original post, the University of Alberta professor Ubaka Ogbogu stated he would continue to wear a mask, primarily "to "spite Kenney."
"Sad to see how deranged the left has become," the premier's response said.
"This NDP law professor will wear a mask 'to spite' me. Why is everything always political to these lefties? And why is the NDP angry about getting life back to normal?"
Ogbogu demanded that Kenney delete the post and apologize, and threatened to sue Alberta's premier over an attack that he considers "a violent call to arms" against him
"These attacks are actually quite dangerous and have resulted in vicious racist attacks against me in the past," he said in an interview with CTV News Edmonton.
"I think it will very easily pass the bar for defamation. He cannot claim that he's telling the truth, because I am not deranged, factually speaking. And I am not, in any way, affiliated with the NDP," Ogbogu said.