Wanda SykesandChelsea Clintonled the fierce and swift backlash againstRoseanne Barrfor her baldly racist Twitter rant overnight on Monday, with Sykes quitting as a consulting producer on the actress’s hit ABC sitcomRoseanne.

The comedienne then wrote: “ISLAM is not a RACE, lefties. Islam includes EVERY RACE of people.”

After several more hours of retweeting false conspiracy theories while the Twitterverse expressed outrage at Barr’s racism, with calls for the cancellation of her show, the star tweeted an apology:

“I apologize to Valerie Jarrett and to all Americans,” Barr wrote. “I am truly sorry for making a bad joke about her politics and her looks. I should have known better. Forgive me – my joke was in bad taste.”

Ron Batzdorff/ABC via Getty; Vera Anderson/WireImage

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While ABC has not yet issued a statement, Sykes quit via Twitter shortly after noon Tuesday: “I will not be returning to @RoseanneOnABC.”

Other celebrities and notables also expressed their outrage following Barr’s jaw-dropping rant.

RELATED VIDEO: House Divided: Lecy Goranson on How the Cast of ‘Roseanne’ Is Able to See Past Political Differences

The comedienne thentweeted out the right-wing falsehoodthat Soros, who is jewish, is a Nazi sympathizer​.

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Chelsea responded to Barr’s tweet about herself:

“Good morning Roseanne – my given middle name is Victoria. I imagine George Soros’s nephews are lovely people. I’m just not married to one. I am grateful for the important work @OpenSociety does in the world. Have a great day!”

Barr then shot back at Clinton with more falsehoods about Soros:

“Sorry to have tweeted incorrect info about you! I Please forgive me! By the way, George Soros is a nazi who turned in his fellow Jews [to] be murdered in German concentration camps & stole their wealth-were you aware of that? But, we all make mistakes, right Chelsea?”

Barr finished her Internet tirade with a tweet that stated “I apologize. I am now leaving Twitter.”

source: people.com