Where does the belief that Africn black people are more violent than other races come from?

I think it is obviously a myth that African black people are more prone to violence than other races. Look at the mass shooters that are mostly white. Look at the African countries destroyed by European white people. European White people created violence, traveling around the world colonizing other African nations. I think its European white people that have a history of violence.

Where does the belief that Africn black people are more violent than other races come from?
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