„Nor is it only the Germans and Austrians who take the view that as a matter of right they can treat their countrymen resident in America, even if naturalized citizens of the United States, as their allies and subjects, to be used in keeping alive separate national groups profoundly anti-American in sentiment, if the contest comes between American interests and those of foreign lands in question. It has recently been announced that the Russian government is to rent a house in New York as a national center to be Russian in faith and patriotism, to foster the Russian language and keep alive the national feeling in immigrants who come hither. All of this is utterly antagonistic to proper American sentiment, whether perpetrated in the name of Germany, of Austria, of Russia, of England, or France or any other country.“

— Theodore Roosevelt

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„Americans and Europeans alike sometimes forget how unique is the United States of America. No other nation has been created so swiftly and successfully. No other nation has been built upon an idea – the idea of liberty. No other nation has so successfully combined people of different races and nations within a single culture. Both the founding fathers of the United States and successive waves of immigrants to your country were determined to create a new identity. Whether in flight from persecution or from poverty, the huddled masses have, with few exceptions, welcomed American values, the American way of life and American opportunities. And America herself has bound them to her with powerful bonds of patriotism and pride. The European nations are not and can never be like this. They are the product of history and not of philosophy. You can construct a nation on an idea; but you cannot reconstruct a nation on the basis of one.“
— Margaret Thatcher
„When in 1909 our battlefleet returned from its voyage around the world, Admirals Wainwright and Schroeder represented the best traditions and the most effective action in our navy; one was of old American blood and of English descent; the other was the son of German immigrants. But one was not a native-American and the other a German-American. Each was an American pure and simple. Each bore allegiance only to the flag of the United States. Each would have been incapable of considering the interests of Germany or of England or of any other country except the United States.“
— Theodore Roosevelt
„The question really isn't whether I'm American, Russian, Iranian, Azerbaijani, or anything else. I've been shaped by all these people and cultures and I feel quite comfortable among all of them.“
— Lotfi A. Zadeh
„If he tries to keep segregated with men of his own origin and separated from the rest of America, then he isn't doing his part as an American. There can be no divided allegiance here. Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag, and this excludes the red flag, which symbolizes all wars against liberty and civilization, just as much as it excludes any foreign flag of a nation to which we are hostile. We have room for but one language here, and that is the English language, for we intend to see that the crucible turns our people out as Americans, of American nationality, and not as dwellers in a polyglot boarding-house; and we have room for but one soul loyalty, and that is loyalty to the American people.“
— Theodore Roosevelt
„The man who calls himself an American citizen and who yet shows by his actions that he is primarily the citizen of a foreign land, plays a thoroughly mischievous part in the life of our body politic. He has no place here; and the sooner he returns to the land to which he feels his real heart allegiance, the better it will be for every good American. There is no such thing as a hyphenated American who is a good American. The only man who is a good American is the man who is an American and nothing else.“
— Theodore Roosevelt
„The American people should itself do these things for the immigrants. If we leave the immigrant to be helped by representatives of foreign governments, by foreign societies, by a press and institutions conducted in a foreign language and in the interest of foreign governments, and if we permit the immigrants to exist as alien groups, each group sundered from the rest of the citizens of the country, we shall store up for ourselves bitter trouble in the future.“
— Theodore Roosevelt