She doesn’t have to sing it. She is required by tradition and respect to place her hand over her heart wile otherwise behaving respectfully
The team heads are required to enforce this. Anything otherwise is worthy of the country’s disgust. The team is responsible to not allow players who disrespect tge flag/country while in uniform and at an official function to not allow these people to be captains of tge team
The fans and spectators are required by their pledge of allegiance to the flag and country to turn it off and not participate
But she has freedom of speech.
The VILE, FUGLY B!TC}{ DOESN’T HAVE A HEART !!!