Answer:In the very beginning of the letter he establishes his ethos by saying “My Dear Fellow Clergymen”. By doing this he establishes that he is an equal to those who criticized him. He also states that he is the president of the Southern Christian Leadership Conference. He then reminds them that he was invited to Birmingham through the conferences affiliate. He also builds the ethos of the Southern Christian Leadership Conference by providing information about their operation in every southern state and information about the large number of affiliates that they have.
Later in his letter MLK notes that he is a minister of the church. He reminds the readers of this before he discusses his disappointments with the church, so his claims will be taken seriously. He uses all of these things to build his ethos, so that he can show that he is equal to his critics. He needs to remind them that he is an equal so his argument is something of worth.
Step-by-step explanation: