Walt Disney was a proud American, who not only embraced, but exemplified the American Spirit of Exceptionalism. This is evident still today with attractions like The Hall of Presidents and the American Adventure. Visitors to Disney theme parks will notice that each park has a large flag pole proudly flying the American Flag.
The Magic Kingdom theme park holds a daily Flag Retreat Ceremony, which I highly recommend you watch if you can fit it into your touring plan. The ceremony is conducted by Disney Security cast members with an assist form a veteran touring the park that day, who is chosen at random.