Taking a knee is an ineffective form of protest because it distracts the discussion away from the actual issue. In America, the flag and anthem are seen by most as symbols of pride that should be respected without exception. The fact that, after Kaepernick knelt, the majority of the discussion was not actually about the issue of police violence itself but about whether or not kneeling was legitimate should show that the discourse generated is not actually helpful to the movement.
Kneeling serves as a distraction to the actual problems that African Americans face by making the otherwise popular cause of equality a controversial issue. Regardless of what Kaepernick and his subsequent supporters knelt for and whether they were un-American, most of the audience's initial reaction was one of shock and disapproval, not one of celebration and awareness.
Public figures, from President Obama to Dabo Swinney, the head coach of Clemson University’s football team, have all come out to voice their disapproval of kneeling in front of an anthem that stands for peace, security, liberty, and so much more than just racist America.
Police brutality is a legitimate issue, but taking a knee is not the right way to talk about it.