Answer:
He reacted to the accusations by writing the famous "Birmingham Letter of Prison" to respond to criticism of his work and ideas, which were called foolish and untimely.
Explanation:
King wrote the letter from the Birmingham, Alabama, city prison where he was confined after being arrested for his participation in the Birmingham campaign, a planned nonviolent protest conducted by the Alabama Christian Movement for Human Rights and Southern Christian Leadership Conference "against racial segregation by the Birmingham city government and merchants in the central region.
King's letter is a response to a statement made by eight white clergymen from Alabama on April 12, 1963, entitled "An Appeal to Unity."
Clerics agreed that social injustices existed, but argued that the battle against racial segregation should be fought only in the courts rather than on the streets.
The letter includes the famous statement "Injustice anywhere is a threat to justice everywhere," as well as the words attributed to William Ewart Gladstone quoted by King: "Justice too slow is justice denied."
