YouTube 2019. Army Navy White Power Hand gesture?

breaking down the hand gesture in question from this past army navy game and the meaning of what they were doing, along with my opinion on professionalism.
links below:
https://www.tmz.com/2019/12/16/army-navy-football-white-power-hand-signals-signs-investigation/

https://reason.com/2019/12/16/army-navy-game-white-power-hand-symbol-circle/

https://www.redbubble.com/shop/circle+game+t-shirts