On saluting the flag.

You're not saluting a flag, you're honoring those that sacrificed to build this country and fought & suffered for it's freedoms and the ideals that our country stands for. We don't always live up to those ideals, but that's no reason not to honor those that have. Those people are who this country and the flag represents, not the one's in your example or the bad cops who senselessly killed George Floyd. Nobody is perfect & certainly no country is without it's dark points, but the fact that change has and will continue to come & all of our lives will continue to get better from those sacrifices is what we should honor. George Floyd's death has become an outcry for civil rights and will likely inspire more real change than we've seen in a long time. His sacrifice is worth honoring by honoring the ideals that make that change possible.
I do honor and revere those who gave their lives in service to our country, even those who did so in useless and unnecessary wars. Whether or not the country should have been there, or those wars completely unnecessary or fought on false pretenses, those who died offered their lives with a dedication that deserves honor and appreciation. I get it. And I agree. The fault lies with those who made the decision to send them there.
The flag, however, represents the country, the republic and it's stated ideals of liberty and justice for all ---- and it is a fallacy to a very large degree. And that should not be glossed over. That same flag flies over all, the good, the bad, and the ugly. The things pointed out in my original post show that fact, along with the things you included above. Therefore, I understand anyone who chooses to exercise their right to protest by refusing to stand for the flag, anthem, etc. If we do not hold the country accountable for those things that it does wrong, we are dishonoring those who died toward that end.