“It is impossible to destroy all alleged enemies of freedom everywhere without also destroying freedom in the United States.”

"Niagara Movement Speech" (1905) http://teachingamericanhistory.org/library/document/niagara-movement-speech/ <!--originally a portion of this was cited here to an Address to the Nation speech at Harpers Ferry, Virginia (16 August 1906); published in the New York Times on (20 August 1906) — but that does not correspond with the info at the link. -->
Context: The school system in the country districts of the South is a disgrace and in few towns and cities are Negro schools what they ought to be. We want the national government to step in and wipe out illiteracy in the South. Either the United States will destroy ignorance or ignorance will destroy the United States.
And when we call for education we mean real education. We believe in work. We ourselves are workers, but work is not necessarily education. Education is the development of power and ideal. We want our children trained as intelligent human beings should be, and we will fight for all time against any proposal to educate black boys and girls simply as servants and underlings, or simply for the use of other people. They have a right to know, to think, to aspire.
These are some of the chief things which we want. How shall we get them? By voting where we may vote, by persistent, unceasing agitation; by hammering at the truth, by sacrifice and work.
We do not believe in violence, neither in the despised violence of the raid nor the lauded violence of the soldier, nor the barbarous violence of the mob, but we do believe in John Brown, in that incarnate spirit of justice, that hatred of a lie, that willingness to sacrifice money, reputation, and life itself on the altar of right. And here on the scene of John Brown’s martyrdom we reconsecrate ourselves, our honor, our property to the final emancipation of the race which John Brown died to make free.
Our enemies, triumphant for the present, are fighting the stars in their courses. Justice and humanity must prevail.

"Let's Lock The Door To Islam", Breitbart.com (28 September 2016)
2010s

2000s, 2001, Freedom and Democracy Are Under Attack (September 2001)

Source: Extras

First attributed to Lincoln in 2002, this seems a paraphrase of a statement in the Lyceum address of 1838, while incorporating language used by Thomas E. Dewey (c. 1944), who said "By the same token labor unions can never be destroyed from the outside. They can only fail if they fail to lend their united support to full production in a free society".
Misattributed

Address to the United Nations (1964)
Context: Those who kill their own children and discriminate daily against them because of the color of their skin; those who let the murderers of blacks remain free, protecting them, and furthermore punishing the black population because they demand their legitimate rights as free men — how can those who do this consider themselves guardians of freedom? The government of the United States is not the champion of freedom, but rather the perpetrator of exploitation and oppression against the peoples of the world and against a large part of its own population.

An Uneasy Honeymoon, Time. http://www.time.com/time/magazine/article/0,9171,952783-2,00.html (Sep. 29, 1980)
Said Evren in defense of the decision to take power after the 1980 military coup.

Source: The Sword or the Cross, Which Should be the Weapon of the Christian Militant? (1921), Ch.6 p. 100
Context: Jesus had little to say about political freedom, he had much to say about moral and spiritual freedom. When confronted with the question of human freedom, he saw that unless men's hearts were changed, freedom from Rome would simply mean an exchange of masters. To destroy the oppressors of a nation is not Jesus' way of bringing freedom to its citizens. Real freedom is not a racial, national or international problem; it is personal.