Question

But such an ordinance becomes unjust when it is used to maintain segregation and to deny citizens the First-Amendment privilege of peaceful assembly and protest.

Why does King use this allusion?
to compare two historic documents
to urge patriotic responsibility
to issue a call for action
to state a moral dilemma

Answer 1

to urge patriotic responsibility

King invokes the First Amendment to remind readers of American principles and to hold the nation accountable—encouraging citizens to live up to their constitutional responsibilities rather than accept unjust laws.