The looters and arsonists sent a strong message that anarchy and destruction are tools to be used in protest.

Some national TV networks reported that most of the demonstrators were not violent, but that is false.

Once you see crimes being committed in any situation, you must walk away or you become part of the violent mob, part of the criminal activity.

The protestors who did not loot or burn or assault the police but who remained in the fray are guilty of aiding and abetting those who did by providing them cover and support.

The mob also did something else: it set back race relations in America years.  The violent protests actually created more bias against blacks.

Most Americans deplore the tactics of violence, even if they agree with the protest cause.

I know many African-Americans who were appalled at the display, well understanding the violent images in Ferguson alienated good people who are sympathetic to the concept of equal justice for all.

Talking Points has documented how rare police killings of Americans really are.

Ninety-nine-point-nine percent of all police arrests do not result in a fatality.

But the racial agitators are having none of that.

Writing in the New York Times yesterday, Georgetown University professor and MSNBCanalyst Michael Eric Dyson says, quote:

"As for the plague of white cops who kill unarmed black youth, the facts of which are tediously and sickeningly repetitive and impose a psychological tariff on black minds, the president was vague, halting and sincerely noncommittal."

Dyson went on to basically call President Obama a traitor to his race for not siding with the violent demonstrators who, in Dyson's view, have a legitimate right to destroy at will.

So let's take a look at this plague of white cops acting violently against blacks, as Dyson puts it.

In the past 50 years, the rate of black Americans killed by policehas dropped 70%.

In 2012, 123 African-Americans were shot dead by police.  There are currently more than 43 million blacks living in the USA.

Same year, 326 whites were killed by police bullets.  Those are the latest stats available.

In 2013, blacks committed 5,375 murders in America.

Whites committed 4,396.

Whites comprise 63% of the population.

Blacks, 13%.

So anyone thinking clearly can see that the homicide rate among blacks is way out of proportion. 

Thus, the police intrusion into black precincts since in a whopping 90% of black homicides the dead person is another black or the offender himself.

Michael Eric Dyson and his soul mates will tell you it is white America's fault the black homicide rate is so high.

He will call you racist if you cite the statistics.

He will label you a white supremacist, as he did to Rudy Giuliani, if you suggest that law-abiding black Americans organize against black on black crime.

The grand jury in Missouri, regular folks, examined the evidence and decided against indicting Officer Wilson.

Maybe they made a mistake.  It's possible, human beings are fallible.

But the lynch mob mentality Michael Eric Dyson, Al Sharpton and other demagogues advocate is a far more obvious mistake.

And that mistake is clear for everyone to see.

And that's the memo.