In the 1960s, the United States worked with the Soviets to sign the Nuclear Nonproliferation Treaty, a pact to prevent the spread of nuclear weapons to states that had not yet obtained them. National Review denounced it as “immoral, foolish, and probably most impractical, a policy that makes nonsense of our defensive alliance in Europe, that favors our enemies and slights our allies.” Ironically, the NPT is now the legal basis for the international effort to prevent Iran from obtaining nukes. So the nuclear agreement conservatives originally denounced as folly is now the very thing they demand be upheld.One could go on; if there has ever been an agreement with any of our enemies that American conservatives have supported, I can't think of it.
The right also fiercely opposed Richard Nixon’s opening to China. Conservative columnists called the administration’s recognition of the communist regime “the liquidation of the anti-Communist stance of the American Government” and compared it to (of course) Neville Chamberlain’s appeasement of Hitler. They likewise denounced Nixon’s policy of detente with the Soviet Union as “one of the greater triumphs of the Soviet propaganda machine,” and the Strategic Arms Limitation Treaty (SALT) as “profoundly unwise.”
Always believing the best about your enemies may be foolish, but always believing the worst makes it impossible to get along in the world.