He would likely have supported Kapernick, based on his support of Muhammad Ali. But his choices were often made out of personal likes and dislikes. He despised Wellington and John Mara, the two owners of the NY Giants. But he loved the flamboyant big spending Jet owner Sonny Werblin and the conniving borderline cheat Al Davis of Oakland. He was in a quandry when Davis moved the Raiders to LA as he had attacked the Maras vuciously for moving the Giants 7 miles to East Rutherford NJ. He couldn’t bring himself to attack Davis even though he admitted to looking like a hypocrite. Almost everything about Cosell was personal, not business.
Personality features of an extremely insecure narcissist. Cosell was a vain, loud mouth NYC liberal pig.