Also Packers and Cowboys fans hate each other (at least younger ones do. Older fans have a weird incestuous love for the Cowboys because they were always on TV).
I'm 57, fu*king hate the Cowboys and their dipsh!t fans. Back in the 70's, which is what I expect this is referring to, I rooted for the Steelers when they beat Dallas in the Super Bowls that decade.
Maybe the writer thinks folks who followed Dallas in the early 90's are older?