Good read and it makes Kaps protest even more relevant and correct.
https://theintercept.com/2016/08/28/colin-kaepernick-is-righter-than-you-know-the-national-anthem-is-a-celebration-of-slavery/?utm_source=The+Intercept+Newsletter&utm_campaign=4ee5f23fac-EMAIL_CAMPAIGN_2018_09_08&utm_medium=email&utm_term=0_e00a5122d3-4ee5f23fac-132064881