“Only a fool or a fraud talks tough or romantically about war.”

Alan Axelrod: Patton On Leadership, p. xi.
Context: He (Patton) was tough. War is tough. Leaders have to be tough. He drove his army hard, yes, and he made many enemies among colleagues and subordinates, but he also produced results. He was indeed arrogant, but sometimes a good leader has to be larger than life. … But the fact is: again typically, Patton's admirers are no more specific in their praise than are his disparagers in their criticism.

Obituaries (1979)

Quotes from acting

Source: The Poetry of Pablo Neruda

Book I, Chapter 9.
Books, Coningsby (1844), Vivian Grey (1826)

Emily Barham
The Americanization of Emily (1964)
Context: War isn't a fraud, Charlie, it's very real. At least that's what you always tried to tell me, isn't it? That we shall never get rid of war by pretending it's unreal? It's the virtue of war that's the fraud, not war itself. It's the valor and the self-sacrifice and the goodness of war that needs the exposing. And here you are being brave and self-sacrificing, positively clanking with moral fervor, perpetuating the very things you detest merely to do "the right thing". Honestly, Charlie, your conversion to morality is really quite funny. All this time I've been terrified of becoming Americanized, and you, you silly ass, have turned into a bloody Englishman

From Book II of Dryden's Aeneid; no exact Latin equivalent exists in Virgil's work, but compare: "Dolus, an virtus, quis in hoste requirat?" (Aeneid 2.390).
Misattributed

War Within and Without (1980)