What do you call a black man on a motorcycle? Stop! Thief!
I think that could be considered pretty offensive if I understand you right. What did you mean by this comment?
Black guys commit crimes and this is a warning to be careful
While it's true that there are some black men who engage in crime, it's a pretty big generalization to insinuate that all black men are criminals. Using that as a punchline to a joke isn't appropriate since it furthers that harmful stereotype that black people commit more crimes than others and this can contribute to more bias against black men in society. Why not avoid using racial humor and joke about something more lighthearted so that more people can enjoy your comedy?