It was the Ferguson decision not to indict Ofc. Darren Wilson that sparked protests. That is, after the Trayvon Martin protests. Shortly after officer Darren Wilson formerly of the Ferguson Police Department failed to be indicted by a grand jury, the New York City police officer-officers involved in the death of Eric Garner have also failed to be indicted.
If you think deeper about why these adverse events have suddenly taken place, have you come to the conclusion in your mind it's possibly because scripture in the Bible has to be fulfilled?