What is the controversy surrounding #takeaknee

[Athene]

Blacks, at 13% of the population, commit about half of all murders. You can draw your own conclusions.

Blacks at 13% of the population, also account for 47% of wrongful convictions, according to a recent report by the National Registry of Exonerations.
http://www.cnn.com/2017/03/07/politics/b...index.html

What conclusions do you draw from that?