I mean....doesn't even need to be a Bills fan. My buddy from grade school, who ended up living across the field from me years later, was a huge Giants fan. Being a big football fan, he watched our games and I would often watch his, for years. He died of pneumonia last year in March.
He watched the Houston playoff loss with me of course, and when I was completely dejected and about as sad as a grown man can be over a damn game, he told me to "bring it in", gave me a big hug and a pat on the back, and said, "you guys have a great team. You'll be back next year".
Wish he could see it! Although....he'd be real upset to see his Giants!!!!