Skipping a practice is one thing. Kneeling for the National Anthem is another entirely. And if it's sanctioned by the university, it makes it several orders of magnitude more unacceptable.
Currently, players aren’t on the field and never have been on the field during the national anthem. If there is a change to that this year, it’s 100% to allow the players to kneel.
I understand your point and respect that. I used to feel the same way. I still personally hate the kneeling but I’ve just accepted that’s it’s probably not going away anytime soon. I prefer that to the looting and rioting. I am glad that we have the freedoms to do demonstrations like kneeling for the flag, no matter how stupid and polarizing that may be. Lots of places in the world you’d get killed for demonstrations like that.