How did government policies in Darfur contribute to the genocide there?

How did government policies in Darfur contribute to the genocide there?
The Sudanese government sponsored concentration camps in Darfur.
The Sudanese government sponsored deportations of non-Arabs in Darfur.
The Sudanese government sponsored the destruction of farms in Darfur.
The Sudanese government sponsored the killing of non-Arabs in Darfur.