In 1992 a black guy painted the N-word across the front of my house.  I had a black roommate, a Ryerson student and the guy was his classmate in sociology..  When I called the police, they accused me of doing it and threatened me with arrest.  The guy was forced to apologise to for his hate  crime , but he said :" You white people have no sense of humour".

The problem is that it happens all the time and nobody is willing to admit it.