Actions have consequences. How long would you keep your job if you "spoke your mind" in a way that offends your boss?
Pundits, meanwhile, continue to opine on the reason for the fall, with some trying mightily to dismiss a J.D. Power survey in July that put most of the blame on players who protest the National Anthem, the most prominent of them being Colin Kaepernick, who does not currently play for an NFL team.

That survey indicated 30 percent of the viewers who watched less football in 2016 than they did the season prior said they did so because they were offended by players protesting the anthem.
NFL Boycotts are making a difference!!!!