I’m in favor of Colin K’s “taking the knee”. I used to go to Halle orchestra concerts when I was a student in Manchester and I would “take the rump”: I would remain seated during the national anthem. My reason was the content of that anthem–all about the Queen. I would have stood for a non-royalist anthem. I was not “disrespecting the flag” or the country, just expressing my opposition to monarchism. I see Colin K. as expressing a specific protest (racial injustice) not some generalized disrespect for America–just as I was not expressing some general disrespect of England.