There are historic situations in which refusal to defend the inheritance of a civilization, however imperfect, against tyranny and aggression may result in consequences even worse than war.
Not only in America but in Germany, in France since the war, in Germany after the First World War, the Germany of Adenauer, these are the creative relationships of Catholicism to a free society that the average American doesn't fully appreciate.
Democracies are indeed slow to make war, but once embarked upon a martial venture are equally slow to make peace and reluctant to make a tolerable, rather than a vindictive, peace.
We have to risk a nuclear war in order to escape capitulation to Communism. For all I know, we may stumble into this terrible war.