It seems that there are people in this forum who have manufactured a definition of racism to meet their desires. In that definition, a black person calling another black person a name becomes a racist. In particular, a black independent or democrat saying anything negative but a black right-winger. The accusation of racism in such an instance makes no sense given the definition of the word.
The definition of racism, according to Webster, is:
a belief that race is a fundamental determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
also : behavior or attitudes that reflect and foster this belief : racial discrimination or prejudice
: the systemic oppression of a racial group to the social, economic, and political advantage of another
: a political or social system founded on racism and designed to execute its principles
a belief that race is a fundamental determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race; also : behavior or attitudes that reflect and foster this belief : racial discrimination or prejudice… See the full definition
www.merriam-webster.com
The definition of racism, according to Cambridge, is:
policies, behaviours, rules, etc. that result in a continued unfair advantage to some people and unfair or harmful treatment of others based on race
harmful or unfair things that people say, do, or think based on the belief that their own race makes them more intelligent, good, moral, etc. than people of other races
1. policies, behaviours, rules, etc. that result in a continued unfair…
dictionary.cambridge.org
A black person disparaging another back person is certainly not doing so because they think they're superior based on race.