AT THE END of one of Europe’s many holiday weekends, the irony is so thick here you can layer it on with a trowel. Europeans, with a few laudable exceptions, detest what the American cowboys have done in Afghanistan and Iraq and are happy to tell you so. The irony, of course, is that 60 years ago, American troops liberated Paris, marched on to Berlin and saved Britain and the rest of Western Europe. Our interest in defeating the Nazis was the same as our interest in defeating the Taliban and Saddam Hussein: in the short term, to free oppressed...