Competitive team sports are just more attractive to fascists. (not to say that liking sports makes you a bad person) Leftists naturally have a more co-operative attitude while fascists thrive off the win/lose dichotomy. Leftist have more important things to obsess over while fascists are always on the hunt for a group to otherize. Sports gives them a perfect target in the form of the opposing team and their fans to practice hating and dehumanizing.