Alcohol definitely fans the flames.I've been to the past 3 games in Kinnick and have rarely had a problem. I went to the Chiefs vs. Patriots AFC title game in Arrowhead and was wearing a Tom Brady jersey and received so much hate it was disgusting. Beer thrown at me, shoulder checked walking through the crowds, etc. I'm sure the availability of alcohol at the stadium enhances all those things though.
Chief fans are borderline psychotic