There is a point at which the marginal benefit of drawing attention to and "fighting" racism is exceeded by the marginal cost.  At this point, doing so is not beneficial and produces negative effects.

An analogy used in colleges to teach the concept of marginal benefit and marginal cost is this: what is the marginal benefit vs. marginal cost of drinking a beer?  The marginal benefit of the first beer is great, in that it tastes great and provides the enjoyment of some alcohol.  It doesn't cost much, so drinking it is worth it.  As the night wears on, and your number of beers increases, the marginal benefit of your nth beer decreases, and the cost increases in that added to the financial cost, that last beer may make you sick.  At this point, the marginal cost outweighs the benefit of an additional beer.  The same concept can be applied to drawing attention to, denouncing, and "fighting" racism.

In the wake of the 2016 presidential election, Facebook feeds and news channels were flooded with anecdotal pictures of swastikas painted on public buildings and interviews with newly outspoken random KKK members.  These posters and news reporters felt that these activities were providing a marginal benefit greater than the marginal cost; otherwise, they would not engage in these activities.

Racism existed in very large numbers at one point in this country.  During that period, the marginal benefit of effort of drawing attention to, publicly denouncing, and fighting racism exceeded the cost because there were tangible benefits in fighting for equity for the black population and little adverse affects.

Racism still exists in this country, as it does in every country.  However, the overwhelming percentage of the 60,000,000 Trump voters and of the rest of the 300,000,000 Americans are not racist.  Like other forms of evil, racism will always exist in some form or another.  When the numbers become small, effort spent attempting to affect very small numbers return no marginal benefit.

Some may trumpet, "I will not stop fighting racism until the last racist is purged from the face of this earth!"  

That sounds helpful, but what about the marginal cost of all of this drawing attention to racism that exists in small numbers of people?  Are there costs?  Contrary to some other forms of evil, the answer is yes.

1. Just as a streaker runs across a baseball field and the TV cameras don't point at him so as not to empower him, drawing attention to a minuscule number of individuals who will never be eradicated only empowers them with the attention they seek.

2. Focus on racism draws attention away from discourse on what the vast majority of black, white, and yellow caring Americans would like to see: increases in the standard of living for the black population.  By focusing on racism as the current major source of economic plight of blacks, solutions like enhancing our educational system and fighting drugs and crime are discussed less.

3. Extrapolation of small numbers to a larger population is used as a tool to create resentment between races where it may not exist otherwise.  Harping on small incidents and applying their meaning to a larger population and their beliefs creates a divide rather than a bridge between different races.

4. Over-emphasis on racism as the cause of the economic plight of minorities may in some cases disempower those it is claiming to try to help.

There may be marginal benefits to people who make it a habit to constantly draw attention to and denounce racism.  It may employ people and empower and help elect politicians without acknowledgment of the costs. 

Those benefiting from such activities are the same people who may find a positive marginal benefit in labeling me racist for proposing this discourse.