I don’t know all the things she is protesting. It’s possible I may agree with some of them. But it is a crap move to take the spotlight from her fellow competitors who finished ahead of her at the awards podium in their moment of glory.
She should have saved her actions for after in the spirit of sportsmanship and respect for her competitors.
She has the right to do what she wants in that situation. Everyone else has the right to approve or disapprove. In today’s world I think you can find many that would approve even ridiculous and offensive things. The wonderful thing about freedom is the right to express what you respect and what you do not. Just realize that most feel you respect the country about as much as you love the country and that will not be the same for all Americans. Oddly, maybe no one that played a part in what she is unhappy about is there or will ever know her feelings.