Any statement made about any ethnic group that is generalization based on a blanket statement is false. ( ethnic groups are a very bad classification system )
Generalizations are not racist .
Comedians have a right to make jokes about any content no matter how obscene but they don't have a right too others laughs.
Comedians can also be personally racist.
For example Idubbz uses the statement "********faggot" to refer to himself which is both equally derogatory to gays and blacks but, no one hits him for the gay part.
This is very different from a openly racist comedian calling random people "********s" .
Intent is more important then the actually words when it comes to this.
The show has a right to exist from a legal perspective but, the idea of making white people seem racist or ignorant as a generalization can be a joke. The real question is
1. is it funny within its context
2. is it to push a narrative and the joke format is only a cover up
3. was the writers intent to create a racist joke to appease black racist.
more context on racist remarks
a white man calling a black man a "********" is not always racist
the white man may have no problem or care about black people as a whole but only use the word to hurt the person the insult is thrown out ;
hence even if a person of one groups throws a racial insult towards a member of another racial group does not mean the person who spoke the word is a racist.
The movie is fine if it is generally funny but if its clearly anti white by the majority then I would consider it no better then the early black slave humor