Americans have little native skepticism. Our collective naivete takes many forms. One kind is a certain receptivity to foreign ideas, especially when they're presented as pleasure, or play.
In America, we have baseball (invented here in the late 19th Century), American football (a superior hybrid form of European football, adapted and refined in the 19th & 20th Centuries), basketball (invented in the late 19th Century in America), and ice hockey (refined and adapted in North America from earlier versions played on ground surface in Europe). These sports are known as the "big four" in common parlance, and command the lion's share of fan support and interest in America and Canada.