Many people were furious when Donald Trump Jr. made a flippant Holocaust remark on Thursday morning ― especially GQ news correspondent Keith Olbermann, who responded by calling both Trump and Trump Jr. assholes.

Hey @realDonaldTrump your son just made a joke invoking Bernie Sanders and gas chambers. Asshole: gonna do something about Asshole Jr? — Keith Olbermann (@KeithOlbermann) September 15, 2016

Trump Jr.’s comments came at the end of a rant about how soft he claims journalists have been on Hillary Clinton’s campaign.

“Without the media, this wouldn’t even be a contest, but the media has built her up,” Trump Jr. said. “They’ve let her slide on every indiscrepancy [sic], on every lie, on every DNC game trying to get Bernie Sanders out of this thing. If Republicans were doing that, they’d be warming up the gas chambers right now.”

This isn’t the first time Olbermann has gone after Trump’s campaign. Just a few days ago, he said Clinton was wrong when she said half of Trump supporters are deplorable, because Olbermann said they’re all deplorable.

Editor’s note: Donald Trump regularly incites political violence and is a serial liar, rampant xenophobe, racist, misogynist and birther who has repeatedly pledged to ban all Muslims — 1.6 billion members of an entire religion — from entering the U.S.