re: Is standing, locking arms, head down better than kneeling?

You're analogy has too many holes in it.

First, if the NFL had a rule on it then it would be up to the NFL to manage to that rule. It's not the U.S. governments job to regulate it.

With sanctuary cities, it's the US governments law, so I have no problem with the US government managing to its own law.

If the sanctuary cities chose to ignore its OWN law, it would be the same as my Comment on the NFL.