"She was a yeller - she would yell at people especially to people she didn't recognize and that's scary when you're exhibiting this extreme diva behavior to people who didn't do anything", said the former exec, who worked with Barr for two years in the '90s.
Arnold, who had turbulent four years of marriage with the sitcom star prior to their divorce in 1994 told Cooper that she had a long history of racist tweets.
As a result of Barr's tweets, ABC canceled the series, and the president of ABC Entertainment, Channing Dungey, released the following: "Roseanne's Twitter statement is abhorrent, repugnant and inconsistent with our values, and we have made a decision to cancel her show".
President Donald Trump on Wednesday broke his silence about the racism row engulfing supporter Roseanne Barr, not to condemn her outburst but to attack ABC television for broadcasting "horrible" statements against himself.
'I think I'll b better tomorrow. I begged them not to cancel the show. After her tweet, many Twitterati pointed out the tweet's racist nature. Barr has since deleted the tweet and apologized to Jarrett. He suggested that Barr wanted the show to get cancelled.More news: Trump weighs in on cancellation of 'Roseanne'
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"I'd rather say nothing than to cause more trouble", Goodman, 65, said, adding that "everything's fine".
Barr was sacked after she sent a series of racist tweets Tuesday about Valerie Jarrett, a former aide to President Barack Obama. "The Roseanne I know could probably use some compassion and help right now", he tweeted. "She is a fucking asshole, but so am I. No one ever stood up to her like I did".
In one of the tweets that sparked outrage, she wrote, "Muslim brotherhood & planet of the apes had a baby=vj".
Barr, who had apologised for her comments, tried to further fix the damage on Wednesday, tweeting: "I'm not a racist, I never was & I never will be". I BLAME MYSELF OK? it's just an explanation not an excuse, Ok, bully? "Nice!" Barr, however, was much nicer to Goodman and actress Laurie Metcalf, who played her sister on the show. "Forgive me - my joke was in bad taste". She followed it up with an apology that read, "I apologize to Valerie Jarrett and to all Americans".