I, and many of my friends, spent a few years toting guns around the desert in the early 1990s so Mr. Rose-Ivey and others (including YOU) could continue to say your piece and express your views. I did not like being there and still wonder whether it was helpful in any way. But a whole bunch of Kuwaitis were awful glad we showed up.
This country was founded on and built for dissent. The flag is a piece of cloth, the song is a ripoff of much older music but with patriotic American lyrics. There is nothing sacred about anything involved except the blood spilled and lives given by those who fought to make sure we all have the right to protest any damn thing we want. I don't care if it's the taste of the water, the treatment of our fellow people, or the color of the sky. Good men and women died so these people could make their political point.
You may or may not agree. You also have the right to protest THEIR protest in your own way. But do not call them un-American. There IS nothing more American than trying to make your voice heard. Boston Tea Party anyone? Kent State?
Because you do not see or agree with their cause does not make it any less important to them. And I would hope we can all agree on that, at least.
See this for the origins of our hallowed anthem:
https://en.wikipedia.org/wiki/To_Anacreon_in_Heaven#The_earlier_version_of_the_lyrics