What would Martin Luther King Jr., think of the United States today?

he would probably be happy that his speech and assassination made the world realize what they were doing.

That finally black people are as equal as white people in the US.

Explanation:

Hecklers veto.

Explanation:

Legally speaking, a heckler's veto refers to a restriction of a speaker's right to avoid a reaction from another party, such as the prohibition of a demonstration based on the expected adverse response of those opposed to it.

In 1977, a group of Holocaust survivors obtained an injunction banning a National Socialist Party of America's march. However, in June 1978 the courts ruled in favor of the nazi organization´s freedom of speech and assembly, protected by the First Amendment.