I'm going to call 911 on a black man
Why are you going to call 911 on a black man?
Of course, they are all criminals
If you really think that a crime is being committed, then you should call 911, but it sounds like you expect this man to commit a crime just because he is black.  It is wrong to judge everyone based on the color of their skin, and calling the police is extremely reckless.  Police officers who think the same way you do have murdered black men in the past, so you shouldn't be giving them the chance to do it again.
Do you have a black penis? What is your opinion like this?
You should not be so quick to judge someone because of their skin tone. Calling the police on a black man for no reason at all is irresponsible and racist. Instead, you practice tending to your own concerns.