Is it true that the only hate-filled and violence obsessed Christians are white people?

Those would NOT be the true Christians. Those are the ones that hide behind the name, only trying to project that they are good people, when their actions and words tell someone otherwise. True Christians actually follow the teachings of Christ and know scripture to support their views and opinions, but would never consider forcing Christianity on someone else.
I'm no longer a Christian, but I still try to apply the teachings of Christ to love my neighbor.