They have not learned anything because a great many of them are simply not very intelligent. Sports has always been a "brawn over brains" type of activity. Now they are scouring the worst inner-city neighborhoods for players who have physical talent. They have been brought up in households that did not instill discipline and decency into them. They are basically thugs who take out their thuggery on the playing field (and sometimes on their wives and girlfriends). I'm glad Trump rescinded the invitation.
You’re right- but why don’t the OWNERS tell them to knock it off? It’s like they are afraid of the players.
I am sure they could find several hundred others willing to be starting NFL players- these may NOT be the only talented people in the country.