Original sentence: The opponents of affirmative action say that using it to remove discrimination is counterproductive, both because it requires the very discrimination it is seeking to eliminate in order to work and because it promotes prejudice by increasing resentment of those who are the beneficiaries of affirmative action from those who have been adversely affected by the policy
Edited sentence: The opponents of affirmative action, who form the vast majority of the public in the US, say that using it to remove discrimination is counterproductive, both because it requires the very discrimination it is seeking to eliminate in order to work and because it promotes prejudice by increasing resentment of those who are the beneficiaries of affirmative action from those who have been adversely affected by the policy