I don't think we can say that blacks Afro americans have no culture becasue we do we have in the last in the last centuries made numerous contributions in the area of culture music books art drama and religion (i think it is safe to say that black christianity silam is different than others)
More to the order of what youa are talking about

I think that it becomes a dangerous game to compare blacks to
immigrant groups

first immigrants who come to america believe in the american drea