Well, why do blacks accuse white cops of racism? Are they all liars? Are there no racist white cops?
I know a lot of racist blacks and I know a lot of racist whites. It exists. Don't pretend it doesn't.
It's a sin to tell a lie.
I think that when a white cop beats up a white guy, there is a tendency to give the cop the benefit of the doubt. When a white cop beats up a black guy, it's always portrayed as racism. Some times it is, but some times it isn't.