A black man and a mexican are in a car. Who's driving? The cops
I don't think that's very funny.  Do you really think that people of color are always criminals?
So once again I'm racist....
Making stereotypical comments about blacks and Mexicans certainly is a racist thing to do.  It's wrong to judge them all as criminals.
I'm just pointing out that the majority of people in prison are criminals.
Yes, the people in prison are criminals but black people and Mexicans aren't inherently law-breaking or dishonest. Telling jokes like this will lead people to think you're being racist.