“Our worst enemies here are not the ignorant and the simple, however cruel; our worst enemies are the intelligent and corrupt.”

1950s, Loving Your Enemies (Christmas 1957)
Context: Third we must not seek to defeat or humiliate the enemy but to win his friendship and understanding. At times we are able to humiliate our worst enemy. Inevitably, his weak moments come and we are able to thrust in his side the spear of defeat. But this we must not do. Every word and deed must contribute to an understanding with the enemy and release those vast reservoirs of goodwill which have been blocked by impenetrable walls of hate.

Original: L'orgoglio è il peggior nemico dell'amore.
Source: prevale.net

1910s, The Progressives, Past and Present (1910)
Context: Violent excess is sure to provoke violent reaction; and the worst possible policy for our country would be one of violent oscillation between reckless upsetting of property rights, and unscrupulous greed manifested under pretense of protecting those rights. The agitator who preaches hatred and practices slander and untruthfulness, and the visionary who promises perfection and accomplishes only destruction, are the worst enemies of reform; and the man of great wealth who accumulates and uses his wealth without regard to ethical standards, who profits by and breeds corruption, and robs and swindles others, is the very worst enemy of property, the very worst enemy of conservatism, the very worst enemy of those “business interests” that only too often regard him with mean admiration and heatedly endeavor to shield him from the consequences of his iniquity.

Source: The Unabridged Journals of Sylvia Plath

1960s, The American Promise (1965)
Context: For Negroes are not the only victims. How many white children have gone uneducated, how many white families have lived in stark poverty, how many white lives have been scarred by fear, because we have wasted our energy and our substance to maintain the barriers of hatred and terror? So I say to all of you here, and to all in the Nation tonight, that those who appeal to you to hold on to the past do so at the cost of denying you your future. This great, rich, restless country can offer opportunity and education and hope to all: black and white, North and South, sharecropper and city dweller. These are the enemies: poverty, ignorance, disease. They are the enemies and not our fellow man, not our neighbor. And these enemies too, poverty, disease and ignorance, we shall over, come.

Source: Disrupt You! (2015), p.235

Republican Governor Popularity Plummets, May 19, 2010, The Daily Beast http://www.thedailybeast.com/articles/2011/05/19/republican-governor-popularity-plummets-from-ohios-kasich-to-floridas-scott-to-wisconsins-walker.html,

Source: Choke