I don't agree with Pat's uber-isolationism, but he leans towards a crucial point. We defeated the Nazis, but promtly returned thousands of Russian, Poles, Czech, etc to the Soviet were they were promptly massacred. We liberated the French but condemned the Poles...who's invasion was the start of the war in the first place. Kinda ironic, huh?
Perhaps Buchanan could instead concentrate his time on saying "Was FDR as good of a President as his reputation?"