In people could identify themselves as national groups
and, consequently, should have their own countries.

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it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.