Classless act. And... He is gfs the captain!
Hockey rink is wrong place to protest for/against some real/imaginary political conundrums, and disrespecting flag and national anthem in this kind circumstance is just petty. Regardless of who is classless. It's in The Code of international hockey.
Good thing. Probably every single guy playing in the tournament can take the lesson from this, and move on showing class at the bare minimum level of good conduct, sportmanship, and player-to-player respect.