The reason why the NFL had conflicts with Trump in the past was due to various issues, including players kneeling during the national anthem to protest racial injustice and police brutality, criticism of the league’s handling of domestic violence cases, and disputes over tax exemptions. Trump had been very vocal about his opinions on these issues, often using his platform as president to criticize the league and its players. The NFL, in turn, has pushed back against Trump’s comments and actions, leading to tensions between the two.