As far as I can tell, no one knows where racism begins or ends, whether it is a defense mechanism developed in our earliest beginnings, or how helpful or deep those feelings go. So telling, or ordering others not to be racist seems doomed to failure. People can be taught not to ACT on those feelings. But that does nothing to root the feelings out, if that can even be done.
Most of the noise made about the topic seems only to be increasing the feelings of hostility. That some self-righteous and arrogant people give to themselves the supposed authority to point their Holy finger at others and brand them as racists, is irritating, at best, laughable, at worst. Taking on that ridiculous, self conferred 'authority' apparently fills some deep need these people have to feel superior to others.
Another question might concern the difference between 'racism' and 'preferences.'
I prefer chocolate ice cream. No one has a problem with that. But if I say I prefer to be around white people, self-righteous bitches will come out of the woodwork to condemn that personal preference.
I don't think any person, or group, has the right to tell, much less, command others, about how they should feel, in these matters.
Each person should have the freedom to make his own decisions in all matters. Fuck the self-righteous, bleeding heart do-gooders. They would have no time to go around bitching at others if they would only mind their own damned business.