How many cops does it take to push a black man down the stairs? None.  He fell.
Why did you bring up a person's race in this statement?
Because black people are always in the wrong, who cares about them right? Also, fuck you
Statements like this, and your explanation for it, suggest that black people somehow deserve to be attacked by police, and that we should believe police officers when they say that it was "accidental".  This is the wrong attitude to have, as black people are not inherently criminal, and yet they face daily persecution solely because of the way they look.  We should not perpetuate these problems by making jokes.