"We're appalled and stunned by the apology of Arvind Kejriwal tendered today," Sukhpal Singh Khaira, Leader of Opposition in the Punjab assembly said, making it clear that the state unit wasn't in the loop.
"We don't hesitate to admit that we haven't been consulted on this meek surrender by a leader of his stature," Mr Khaira said as AAP leaders in the state lashed out at the top leader for having allowed himself to be arm-twisted into giving the apology.
Joining them was Kumar Vishwas. Without naming the chief minister, he also tweeted a couplet that was seen to describe Mr Kejriwal as an expert at breaking his group's unity and adept at chopping off his own root. "How can I spit at someone who's an expert at spitting - only to lick it up," he said, seen as a veiled reference to Mr Kejriwal's unqualified apology.
The poet-politician followed it with another couplet that hinted about the disappointment in the ranks to make an outsider feel better and the dashed hopes of the public.
Arvind Kejriwal's sharp and repeated attacks on Mr Majithia during campaigning for last year's state elections was a central theme of the AAP's campaign that had accused the outgoing Parkash Singh Badal government of corruption and Bikram Singh Majithia, then the state's powerful and controversial revenue minister a "drug lord".
An attack on Mr Majithia was seen to be targeting the Badal family that had ruled Punjab for a decade. Mr Majithia is the brother-in-law of then Deputy Chief Minister Sukhbir Singh Badal and Union Minister Harsimrat Kaur Badal's younger brother.
As news of his unconditional apology broke out, AAP lawmaker Kanwar Sandhu tweeted his disappointment.
"If you stand for truth, facing defamation cases is a way of life I am still facing defamation filed by Punjab cable mafia. Will fight it to the end," Mr Sandhu, a former journalist, said.
AAP leaders told NDTV that the apology forms the template of how the party would deal with other defamation cases pending against the Chief Minister and other senior party leaders.
"Contesting Court cases is taking toll on already constrained resources of the party and individuals," AAP spokesman Saurabh Bharadwaj later said in a statement as the party scrambled to arrest the outrage among its supporters.
Ankit Lal, the party's social media strategist said the Congress government agencies had given Mr Majithia a clean chit. "So either you prove that Mr Majithia is guilty (which we can't in current scenario) or you retract," he tweeted.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.