I think it is interesting that a song intended to unite and bring others together can ultimately have unintended consequences as well.
The past NFL season, players were using the time before the game when the National Anthem was being played to kneel, link arms with other players, raise a fist in the air etc. as a demonstration for causes like helping the oppressed or discriminated.
The demonstrations were not aimed to instigate violence but rather raise awareness. The playing of the national anthem is usually a song that brings Americans together. However in the case of the NFL, it has caused dissension and conflict between players, fans, and the owners of the teams. It has led to some to even question why the national anthem is played at sporting events.