The portrayal of black people as prone to violence and incorrigibly dangerous goes beyond fiction and well into the past to the founding of the United States.
For one example, consider the United States' nominal newspaper of record, the New York Times.
Do an internet search using the following terms (no quotes) "NYTimes Giant Negro".
Stereotypes of blacks as intimidating and dangerous go beyond fiction and the end of the Twentieth Century into the domain of "reported facts" and well into the past.
Black people. "Blacks" sounds totally dehumanising.
As a black person, I'm grateful for this feedback. Thank you.
Sure, but pop culture in large part expresses and transmits preexisting stereotypes (and even when it doesn’t, it is perceived through the lens of those stereotypes.)
I'm not saying it's not involved, just that it's not the source.
Urban black communities had (and have) a lot of violence. That's a fact, not a stereotype.
The stereotype is that this is due to the inherently violent, unintelligent, morally inferior nature of Blacks.