The origin of the phrase “barrel of laughs” is rooted in slavery, when enslaved black people on plantations were not allowed to laugh. The white master made them laugh into a barrel. White people never like seeing black joy.
The notion that Black people are violent, is propaganda and projection, by imperialists. Black people do not a have history of violence towards white people, in the way white people have a history of violence towards Black people.
The propaganda that colonial powers have spread, is merely a way to distract from their brutal and immoral past.