If you think you have heard of George Ciccariello-Maher, you probably have. The Drexel University professor has a habit of stirring controversy on social media.

Last week, Ciccariello-Maher sent out a tweet about an encounter involving a veteran he witnessed on an airplane, and it sparked outrage.

"Some guy gave up his first class seat for a uniformed soldier. People are thanking him. I'm trying not to vomit or yell about Mosul," Ciccariello-Maher wrote on Twitter. His account was later made private, but the tweet was captured in screenshots.

Needless to say, people weren’t pleased.

Late last year, Ciccariello-Maher stirred controversy with a tweet about “white genocide,” a term that he claims that many white supremacists use.

"All I want for Christmas is white genocide," he wrote.

The next day, Ciccariello-Maher explained to the Philadelphia Enquirer that he was making a joke about white supremacists who believe a white genocide is underway.

“On Christmas Eve, I sent a satirical tweet about an imaginary concept, ‘white genocide,'" he said. "For those who haven’t bothered to do their research, ‘white genocide’ is an idea invented by white supremacists and used to denounce everything from interracial relationships to multicultural policies.”