Allen, a fellow conservative comedian, was asked during FOX's TCA panel Thursday whether he believed ABC made the right decision in cancelling "Roseanne," after Barr's racist tweet in which she compared Barack Obama's former security adviser Valerie Jarrett to "Planet of the Apes."
The "Home Improvement" icon said that although Barr's tweet was not consistent with "the Roseanne" that he used to know, he also questioned who "makes up" the rules on what a comedian should or shouldn't say and branded the current climate a "dangerous" environment.
"I go way back with Rosie and that's not the Rosie I know," Allen said. "She was the most diverse and tolerant woman I've ever known for a long time. Whatever got in her head isn't the Roseanne I know. It's a very icy time."
"I've been a comedian for 38 years and I've never seen it, like Lenny Bruce said at the Purple Onion, 'We've gone backwards.' There are things you can't say," he added. "There are things you shouldn't say. Who makes up these rules? And as a stand-up comic, it's a dangerous position to be in because I like pushing buttons. It's unfortunate."
However, Allen steered clear of criticizing his former network, stating: "[ABC] had to do what they had to do and it's their decision."
Allen knows firsthand what's it like to be cancelled by the network, which is owned by Disney.
The actor's sitcom "Last Man Standing" ran on ABC for six seasons and was cancelled a few months after the finale aired. However, the show was picked up and resurrected by FOX a year later and the seventh season is to premiere this fall.
Despite all of her controversial tweets and comments, Barr still manages to keep a solid following and it looks like Allen is standing behind her.
Barr attempted to defend her comments last month by claiming that she didn't know Jarrett was black.
In a video produced by her son Jake, Barr offered up further explanations and excuses for her racist tweet in a rage-filled outburst.
"I'm trying to talk about Iran," Barr screamed in the video. "I'm trying to talk about Valerie Jarrett about the Iran deal. That's what my tweet was about." She then began to rage and let out a primal scream: "I thought the bitch was white! Goddamnit, I thought the bitch was white. F--k!"
"Last Man Standing" Season 7 premieres on FOX September 28th.