“The enemy is radical Islam. You can't get around it. And not only will I name the enemy, I will do whatever it takes to defend America from these haters of mankind.”

Garantissez-moi de mes amis, écrivait Gourville proscrit et fugitif, je saurai me défendre de mes ennemis. ("Defend me from my friends," wrote Gourville, exile and fugitive, "I can defend myself from my enemies.") — Gabriel Sénac de Meilhan, Considérations sur l'esprit et les moeurs (1788): "De L'Amitié." Sénac de Meilhan was quoting Jean Hérault, sieur de Gourville (1625 - 1703).
The remark has often been attributed to Voltaire and to Claude-Louis-Hector de Villars.
Misattributed

2000s, Where the Right Went Wrong (2004)

Source: Pakistan or The Partition of India (1946), p. 228

January 26, 2007 http://littlegreenfootballs.com/weblog/?entry=24149_US_Troops_Have_Permission_Not_to_Be_Killed_By_Iranians&only

Robert Spencer talking about identifying Islamic extremists, Michelle interviews Robert Spencer about Religion of Peace: Why Christianity is and Islam Isn’t, 2007-08-13 http://hotair.com/archives/2007/08/13/new-vent-michelle-interviews-robert-spencer-about-religion-of-peace-why-christianity-is-and-islam-isnt/,

Go Rin No Sho (1645), The Water Book

Pali Canon 42-43 Cittavagga The Mind http://www.accesstoinsight.org/tipitaka/kn/dhp/dhp.03.than.html.
Unclassified

1950s, Loving Your Enemies (November 1957)
Context: There’s another reason why you should love your enemies, and that is because hate distorts the personality of the hater. We usually think of what hate does for the individual hated or the individuals hated or the groups hated. But it is even more tragic, it is even more ruinous and injurious to the individual who hates. You just begin hating somebody, and you will begin to do irrational things. You can’t see straight when you hate. You can’t walk straight when you hate. You can’t stand upright. Your vision is distorted. There is nothing more tragic than to see an individual whose heart is filled with hate. He comes to the point that he becomes a pathological case. For the person who hates, you can stand up and see a person and that person can be beautiful, and you will call them ugly. For the person who hates, the beautiful becomes ugly and the ugly becomes beautiful. For the person who hates, the good becomes bad and the bad becomes good. For the person who hates, the true becomes false and the false becomes true. That’s what hate does. You can’t see right. The symbol of objectivity is lost. Hate destroys the very structure of the personality of the hater. [... ] when you start hating anybody, it destroys the very center of your creative response to life and the universe; so love everybody. Hate at any point is a cancer that gnaws away at the very vital center of your life and your existence. It is like eroding acid that eats away the best and the objective center of your life. So Jesus says love, because hate destroys the hater as well as the hated.

Source: Never Again: Securing America and Restoring Justice (2006), p. 181