The best summary of the claim made by King in the passage is Protests are an effective and appropriate way to end injustice in Birmingham.
This refers to a statement which is made about a person which is still unverified until there is the inclusion of a supporting evidence.
With this in mind, we can see that there was a previous claim made by Martin Luther King in the complete text as he states that protests are effective and can be used to end injustice.
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