In the address to to the Nigeria movement, Dubois makes the point by condoning injustice towards its blacks. America is contradicting the values on which it was founded which two answers provide reasoning to support this point.

We want our children trained as intelligent, human being should be, and we will fight for all time against any proposal to educate black boys, and girls, simply as servants, and under lings, or simply for the use of other people
Discrimination and travel in public accommodation has so spread that some of our weaker brethren are actually afraid to thunder against color discrimination as such, and are simply whispering for ordinary deficiencies
It is a fight for ideals are common fatherland to his founding, become in truth, the land of the thief, in the home of the slave, a byword, and a hissing among the nations for its sounding pretensions and pitiful accomplishments
We appeal to the men and women of the nation to those who nostrils are not yet be fed by grade, and snobbery and racial narrowness, stand up for the right, prove yourself, worthy of heritage, and whether born north or south dare to treat men as men

The first answer that provides reasoning to support the point made by Dubois is: "We want our children trained as intelligent, human being should be, and we will fight for all time against any proposal to educate black boys, and girls, simply as servants, and under lings, or simply for the use of other people." This shows that America is contradicting the values on which it was founded by denying equal education opportunities to black children and treating them as inferior.

The second answer that provides reasoning is: "It is a fight for ideals are common fatherland to his founding, become in truth, the land of the thief, in the home of the slave, a byword, and a hissing among the nations for its sounding pretensions and pitiful accomplishments." This suggests that America has strayed from its founding ideals of equality and justice, and instead has become a land where theft, slavery, and discrimination prevail.