Donald Trump Jr. went to Twitter on Sunday to lash out at what he described as the media's "leftist BS", arguing that journalists could save money by reporting the news "for a change".
His tweet came shortly after the Washington Post's Super Bowl ad, which gave kudos to journalism.
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His gesture was met by the jeers of many angry Twitter users, who returned fire by claiming that the president's son's comments "discredit" the media.
Others reminded Trump Jr. of Washington Post columnist Jamal Khashoggi, who was killed last year in Saudi Arabia.
Some netizens pointed to the history of lies which they claimed challenge his own family's credibility.
The Washington Post's commercial, which was narrated by US actor Tom Hanks, "described the role of journalists as eyewitnesses and gatherers of facts," as well as explored "the profession's larger importance to society".
"When our nation is threatened […] there's always someone to gather the facts, no matter the costs", Hanks said in the ad.