"Majority opinions" of the Supreme Court are so important because A. they establish legal precedents.
Often it is required for a law to be passed that the majority votes for it - without the necessary majority opinions, the law will not be enforced.
One of the goals of the Americanization movement was to make immigrants more loyal and moral. This was because many of the anti-immigrant sentiment during the time stated that immigrants were immoral and disloyal to America
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