Answer:
-Birmingham courts have been unjust to African Americans.
-City leaders refuse to negotiate in good faith with African Americans.
The grounds based in which King supported the need for protest is Birmingham courts have been unjust to African Americans and City leaders refuse to negotiate in good faith with African Americans.
The Birmingham courts were behaving in an unjust manner which made King Martin Luther argue through his letter that African Americans had to fight for their justice. Thus, the laws must ensure that no unjust laws are being followed in the nation as freedom is the right for all people.
The leaders of the nation were also not actively persuading to adopt equal law for all, which created a civil movement in order to battle for equality.
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