Foreign policy is more complicated today because there is no longer the "binary choice" between Communism and its opponents.
Trump probably knows little of the inner workings of the State Department, but that knowledge hasn't made Hillary any more correct on her foreign policy judgements over the years. Trump appears to have a real appreciation of how entangling alliances lead to war, and he has a conviction, however simple, that American policy, foreign and domestic, ought to advance the interests of the American people before all else. That's a remarkably coherent worldview that millions of Americans share, but one that has not been well-projected since Ronald Reagan.
There was never such a binary choice in any stage of the Cold War. it was clearly not a straight up battle against communism, because various anti-Russian communist countries had marriages of conveniences with the States like PRC and Cambodia. There was vast internal conflict (none of it as binary as "hawk" vs "dove") over every aspect of the Cold War. I don't see how you can claim foreign relations back then was relatively simple.
