Could solve it with one statement: To the NFL, the Anthem means support and honor to the troops, present and past. Period.
To elaborate: for the NFL, it’s not specifically support for cops, Trump, the wars themselves, slavery, racists, etc - but the men and women who were/are soldiers/sailors/airmen. They allow the NFL to exist.
So, stand during it, or you’re fired.
Best and most succinct statement on this I have seen. Thank you!