Maybe we resent affirmative action because it is a racist program that demeans both white and black?
Much to your dismay, this country was built by primarily whites and their ideals.   Some were good, some were bad.   I hate to disappoint you but Africans had very little concept of freedom in Africa.  Many still do not.   You still have tribes attacking tribes in Africa.   Tell me the truth, would you rather live in this country with all of its problems or in most of Africa?