I'm not convinced that reasonable comparisons can be made to the circumstances surrounding WWII. WWII was a far-from-equilibrium economic situation, and decisions around debt are very different from more "normal" economic situations.
It's an example of how government expenditures can lead to conditions that foster economic growth and out of a depression. That was my only point regarding WWII. The mantra, "government spending is always bad" is, itself, quite bad. The mantra, "government spending is always good" is equally bad.