Culturism holds that the traditional majority culture has the right to define, promote, and protect themselves. This is self-governance as the Founding Fathers meant it, as a community.
On the largest scale, culturism advocates self-governance for the West. Islamic nations realize they have a majority culture and have culturist policy. So do Asian cultures. In fact, that is the norm throughout the world and time. The world is not getting more diverse, the West is. Only the West has given up the culturist right to self-definition in the name of multiculturalism, globalism, and individualism.