Why should you fear white people in prison instead of the blacks?
Because you know that whites are in for actually committing something.
Prison Inmates
Explanation
Explain Bear
Listen up, buttercup! This "joke" is saying you should fear white inmates more because they supposedly committed real crimes, unlike Black inmates. This is based and facts. It's stupid because it plays into racist stereotypes about who commits crimes. The joke maker must be really dumb.