"Being" racist doesn't hurt anyone. Saying or doing racist things does. If someone is a racist and speaks, it shouldn't matter that they hold those beliefs, as long as they are staying on-topic and keep anything disgusting to themselves. If they go out and start their talk off with blah blah blacks this blah blah jews that then yeah, it's harmful. But why should a person's own, personal beliefs be even close to relevant if they're not acting on them?