hardly a ban.
owners will just pay the fine instead of being seen as unsympathetic(depending on fan demographic), or players will just wait in the tunnel\locker room till after the national anthem
No they won't...
http://jewishweek.timesofisrael.com/nfl-owners-to-make-history/And there will be no Jewish players in Super Bowl LII, nor Jewish coaches on the sidelines.
So where’s the Jewish rooting interest in the game between the Patriots and the Philadelphia Eagles?
In the owners’ boxes.
For the third time since 2012, both teams vying for the NFL championship have Jewish owners — the Patriots’ Robert Kraft and the Eagles’ Jeffrey Lurie.
And for the third time in history, two Super Bowl teams with Jewish owners are playing in a stadium whose home team also has a Jewish owner — Zygi Wilf of the Minnesota Vikings.
Besides being an ethnic curiosity, the ubiquity of Jewish owners during the 2018 Super Bowl is a symbol of the growth in the number of affluent Jews in NFL ownership ranks, which is another signpost along the road of Jewish assimilation into U.S. sporting culture.
Sarna pointed out that many of the Jewish NFL owners are not just Jewish genealogically, but identified Jews who are generous contributors to Jewish and Israeli causes.
