[smtddr]

The problem comes when your so-called "separatism" causes me not to get a job, or an apartment, or a promotion, or when you donate money to a campaign to ban interracial marriages. If you can keep it in your own home then that's fine. But that's probably impossible due to human nature. You can't privately dislike a group of people and not have it manifest when you interact with the rest of society. Especially if you're in a position of power/authority.