Explain the politics of assimilation and integration used to establish a national identity.

Assimilation: Assimilation is a process of cultural unification and homogenisation by which newly entering or subordinate groups lose their distinctive culture and adopt the culture of the dominant majority. Assimilation can be forced or voluntary.
For example: Seizure of lands forests and fisheries from minority groups and indigenous people and declaring them national resources.

Intergration: Integration is a process of cultural unification whereby cultural distinctions are relegated to the private domain and a common public culture is adopted for all groups. This usually involves the adoption of the dominant culture as the official culture.
For example: Adoption of state symbols celebrating the dominant groups history, heroes and culture reflected in such things as choice of national holidays or naming of streets etc.