This one goes in the "Everyone-Is-a-Liberal-Interventionist-When-You-Scratch-Them" department. From a New Yorker article I wrote a few years ago about the neocon-realist wars, which focused on the deputy-chief realist Brent Scowcroft. The passage below concerns the run-up to the first Gulf War:

(George H.W.) Bush did not let domestic opposition, or the views of Mikhail Gorbachev, who sought a negotiated solution, stand in the way of what he came to see as a moral cause of surpassing importance. On December 31, 1990, he wrote a letter to his five children: "How many lives might have been saved if appeasement had given way to force earlier in the late 30s or earliest 40s?" it read. "How many Jews might have been spared the gas chambers, or how many Polish patriots might be alive today? I look at today's crisis as 'good' vs. 'evil'-yes, it is that clear."