A banner read: "You traded immortality for mediocrity. Never a Celt. Always a Fraud."
Neil Lennon has taken the reins at Celtic until the end of the season.
"There's a chasm to fill with Brendan leaving," he told Celtic TV.
"He's done a remarkable job, but I'm here for the club.
Celtic fans took aim at Brendan Rodgers (Image: GETTY)
“The club comes first as do the players. I want to bring as much success during my time here as I possibly can.
"All I want to do is carry that on - it's not broken and I'm not coming in and looking to revolutionise anything."
Celtic chief executive reckons Lennon - who previously managed the club from 2010-2014 - was the obvious man for the job.
"In bringing Neil back until the end of the season, we have appointed a man who knows what it means to be Celtic manager and someone who knows how to win," Lawwell explained.
Invalid email
We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy
Brendan Rodgers quit Celtic for Leicester (Image: GETTY)
"We know he has the commitment and desire needed to face the challenges ahead.
"We are delighted to also promote John Kennedy to assistant manager and bring Damien Duff into our first-team management group.
“This will bring vital continuity and allow us to build on Brendan's legacy."
Neil Lennon has taken charge at Celtic (Image: GETTY)
Lennon previously led Celtic to three Scottish Premiership title during his previous four-year stay at the club.
Rodgers managed two title wins and two Scottish Cup victories.