Former Dallas Mavericks GM Nico Harrison was allegedly asked to leave a bar the night before Thanksgiving after the crowd turned on him.Fullcourtpass posted a video of Harrison exiting a bar after Mavs fans allegedly booed him. The account also shared a text message exchange that alleged Harrison had initially tried to pump up the crowd."It's blackout Wednesday, what we on?" Harrison allegedly said.Nico Harrison has fallen out of favor with Dallas Mavericks fans after orchestrating the Luka Doncic trade. He was fired earlier this month after a 3-9 start, with fans chanting "fire Nico" during a 116-114 loss at home to the Milwaukee Bucks.Harrison's image took a hit after ESPN's Tim MacMahon reported that he hadn't been cautious with Anthony Davis' injury, and that owner Patrick Dumont had to step inNico Harrison's reputation in Dallas took a big hit after controversial Luke Doncic trade"Fire Nico" chants were a regular feature of games at the American Airlines Center in the aftermath of Doncic's trade to the LA Lakers.Harrison believed in the 'defense wins championships' mantra and felt that acquiring Davis would make the Mavericks favorites for the title. According to Tim MacMahon, he blamed Luka Doncic's lack of defense for the Mavs' loss to the Boston Celtics in the 2023-24 NBA Finals.However, that move backfired spectacularly and the Mavericks missed the playoffs. Their woes continued at the start of the new season and with fans losing patience, Patrick Dumont decided to pull the plug."This decision reflects our continued commitment to building a championship-caliber organization," said Dumont. "One that delivers for our players, our partners and most importantly, our fans."The Mavericks are 5-14 and sit 13th in the West.