Republican leaders have condemned party colleague Marjorie Taylor Greene over her “appalling” comparison of Covid-19 safety measures to the treatment of Jews in Nazi Germany.

“Marjorie is wrong, and her intentional decision to compare the horrors of the Holocaust with wearing masks is appalling,” House Republican leader Kevin McCarthy said in a statement, while stopping short of calling for disciplinary measures.

“The fact that this needs to be stated today is deeply troubling.”

Ms Greene, a conservative firebrand Representative from Georgia and ally of former President Donald Trump, has thrived on stirring controversy, pushing conspiracy theories and forcefully confronting her colleagues since taking her seat in the House in January.

But until now Republican leaders have proven hesitant to criticise her and refused to join with Democrats earlier this year when they voted to strip her of committee assignments.

Their rebuke on Tuesday came after Ms Greene made an appearance on a conservative podcast, The Water Cooler with David Brody, released last Thursday. In her interview, Ms Greene excoriated safety protocols adopted by House Democrats, including a requirement that masks be worn on the House floor. She also called House Speaker Nancy Pelosi “mentally ill” and suggested that the rules were comparable to the treatment of Jews during the Holocaust.

“You know, we can look back in a time and history where people were told to wear a gold star. And they were definitely treated like second-class citizens, so much so that they were put in trains and taken to gas chambers in Nazi Germany,” Ms Greene said on the podcast.

“This is exactly the type of abuse that Nancy Pelosi is talking about.”

After her remarks sparked a storm of online criticism, Ms Greene took the comparison further.

On Tuesday, she tweeted out a news story about a grocery store chain that plans to allow vaccinated employees to go maskless. Those who do would have a logo on their name tags indicating they had been vaccinated.

“Vaccinated employees get a vaccination logo just like the Nazi’s forced Jewish people to wear a gold star,” Ms Greene tweeted.

Senate Republican minority leader Mitch McConnell called Ms Greene’s comments one of her “frequent outbursts that are absolutely outrageous and reprehensible”. Still, he said any disciplinary action against her would have to come from the House.

Elise Stefanik of New York, the No 3 House GOP leader, said “equating mask wearing and vaccines to the Holocaust” minimised “the most significant human atrocities ever committed”.

Democrats said Ms Greene should face more than just a public rebuke. Representative Brad Schneider proposed censuring Greene, House majority leader Steny Hoyer called on her to “change her rhetoric and behaviour if she intends to remain a Member of the House”. Ms Pelosi, who previously suggested Ms Greene could face an ethics inquiry, called her comments “so beyond reprehensible” that they should have “no place in our country”.

The furore is just the latest provocative chapter in the activist-turned-politician’s brief tenure in the House.

Congress Divided Republicans
House Minority Leader Kevin McCarthy (Alex Brandon/AP)

Earlier this month, Ms Greene followed Alexandria Ocasio-Cortez off the House floor, shouting that the Democrat supported “terrorists” and did not “care about the American people”. She also appeared in Facebook Live video filmed outside Ms Ocasio-Cortez’s office, taunting the congresswoman through the mail slot of a locked door to “get rid of your diaper and come out and be able to talk to the American citizens”.

Before her election, Ms Greene supported Facebook posts advocating violence against Democrats and the FBI. In one 2018 post, she speculated that “lasers or blue beams of light” controlled by a left-wing cabal tied to a powerful Jewish family could have been responsible for sparking California wildfires.

And in February 2019, Ms Greene appeared in an online video filmed at the US Capitol, arguing that two Muslim lawmakers were not “really official” members of Congress because they did not take the oath of office on the Bible.