I loved him as a player. He's a masher on the line. As a person he certainly has shown his true colors. As a person with mental illness he needs to be monitored, treated and helped.
I always waive the banner and proudly identify myself to fellow Bills fans who display their fandom by wearing Bills attire. I always get an enthusiastic response from them. Your co-worker needs to take a big gulp of the Kool Aid and man up.