The film academy on Tuesday announced Hart as host to its February ceremony.
Hart has since deleted some of the anti-gay tweets, mostly dated from 2009-2011.
On Thursday, Hart wrote on Instagram that critics should "stop being negative" after years-old tweets surfaced in which he used homophobic slurs. If you don't believe that people change, grow, evolve? "I don't know what to tell you", said Hart, who added, in all-caps: "I love everybody".
In a 2010 stand-up special, Hart said, "if I can prevent my son from being gay, I will". That's a fear. Keep in mind, I'm not homophobic. The "Night School" actor said he made a decision to pass on giving an apology.
"Asking Hannah Gadsby to host the Oscars is the most obvious thing in the world, come the eff on, Academy", wrote Rachel Vorona Cote on Twitter. Murphy soon after exited, as well. This time, speculation has already been rampant that few in Hollywood want the gig, for which few win glowing reviews.
At a Hollywood event Thursday night, comedian Kathy Griffin, whose career suffered past year when she posted a photo on social media that looked like a beheaded President Donald Trump, said Hart messed up, yet had empathy for the situation. I've said where the rights and wrongs were.
Griffin hoped Hart's departure would open the door for a woman comedian to host the show. Let Gritty host The Oscars. I've said who I am now versus who I was then. "And if he doesn't, I don't think we should hold him accountable, I think we should just remember and forgive him".