What counterclaim in the clergymen’s letter does king address here

In particular King points out that the black community has waited long enough. Dr. King insists that the black man has waited “more than 340 years” for justice, and he then launches into a litany of abuses that his people have suffered both over time and in his present day. Amongst these abuses is his experience explaining to his young daughter why she cannot go to the “public amusement park” because of her skin color. Because the black man has been pushed “into the abyss of despair,” Dr. King hopes that the clergymen will excuse his and his brethren’s impatience (173-174).