Colin Kaepernick is what the old Soviet apparatchiks used to call a 'useful idiot'
Sadly he has plenty of company, idealistic leftists who are being used to destabilize society. These morons live in the freest society in the history of the world, nowhere else on earth have women and minorities been granted such freedom, but they have been brainwashed to believe they are the victims of oppression, as if we are still living under Jim Crow or worse.
By no means am I suggesting our society is perfect, sure there are rogue cops, thugs with badges (Clockwork Orange) or weak men who naturally gravitate towards the power one can exert over others in a police uniform, but this is a relatively small number of cops and that needs to be emphasized and re-emphasized, lest the police force as a whole is unfairly stigmatized. Thats what fair-minded people are objecting too. We know that BLM and the SJW's are completely blowing this thing out of proportion and in the process they are stigmatizing some of the best and bravest among us, people who put their lives on the line every day, often times to protect black people in the inner cities, particularly women, children and the elderly, the most vulnerable people in these neighborhoods who are being preyed upon by a ruthless element of sociopaths ... which I saw firsthand growing up in Alphabet City, not the gentrified and yuppified Alphabet City you see now, but the dystopian Alphabet City Hollywood made movies about in the 1970's ... if you removed the cops (and Mafia) from that neighborhood, the most vulnerable would have been left to the mercy of the merciless.
But I digress. Point being, this whole BLM thing was built on a lie. It was built on the premise that Michael Brown was assassinated by a white cop in cold blood, while he was literally in the act of surrendering ("Hands Up, Don't Shoot!!"), and that turned out to be a complete lie, not according to Fox News or the conservative media, but according to Eric Holder's DOJ following an extensive investigation, where they concluded "Hands Up, Don't Shoot" NEVER HAPPENED. To the contrary, after interviewing a number of eyewitnesses off the record so they could speak freely without fear of intimidation and retaliation (i.e. without fear of being killed), they concluded that indeed Michael Brown was the aggressor and the cop acted in self defense, the same Michael Brown who hours earlier literally strong-armed a sales clerk at a convenience store, so you can see he was a thug and a bully.
That said, you gotta be to the left of Fidel Castro to think for one second that Eric Holder's DOJ had any kind of agenda to protect a rogue cop who assassinated a young black man in cold blood, without provocation, as BLM continues to depict Brown's death till this day. If there was even an ounce of evidence that supported the BLM version of events that day, Holder would have been all too happy to validate it. So the entire BLM movement was built on a lie, which is not to suggest there are not REAL instances of police brutality or worse, but the movement wasn't borne on, for example, the Eric Garner case, in which case all people of good will should be rightfully appalled, that a man should lose his life over selling loose cigarettes! But BLM does not even emphasize Eric Garner because THEY KNOW thats a case where whites and blacks of good will can all agree something terribly egregious went down, and that is NOT the point of BLM, they DO NOT want a consensus, they deliberately choose cases like Brown and Trayvon, thugs who were looking for trouble and found it, because they want this thing to be divided along racial and ideological lines. Thats also why they don't approach this as a problem of a few rouge cops, but as a 'systemic' problem of racism in the police force. Again, because they know the latter approach will keep us divided along racial and ideological lines.
So, coming full circle, the real driving force behind BLM are committed Marxists who are deliberately trying to destabilize our society, and they are doing this by manipulating minorities and using tools like Colin Kaepernick and various other 'activists' to stir the passions of well-meaning black folks. Its ideological subversion and it goes back decades.