Yes,  we enslaved their ancestors, used and abused them as slaves, once freed we did everything possible to hinder their success. Sports for many became their ticket to success and money. Some of them dare to express anger over what their race has been forced to endure in a quiet manner, and Americans misinterpret it as an anti-flag protest, which it wasn't, and go berserk. Their peaceful protest is protected by the First Amendment. None of us will ever know what motivated each player to participate.  Acceptance by all Americans is required. Gratitude is not the issue. Finally, it's a ballgame, not a life or death issue. Let it die a quiet death while we deal with real problems such as hurricane  devastation, possible nuclear war, etc.