Japan did thus and such to China, Germany did so and so to Russia, Russia did you know what to Japan, and China did the same to the Manchurians.
This is the way the world works under statism. All the different centralized governments fight and scrape like wolves over the sheep. Only a few nations with limited governments were able to restrain themselves from this empire-building tendency. America was one of them, for a while.
What one nation does to another is no justification for a third to intervene. Doing so requires alliance with one of the evils. Better to let the wolves fight each other than to send our labrador in to mitigate.
The innocents are the final concern. I believe we should be rescuing innocents and relocating them into our homes, as Christians. This requires extending our necks a little individually, and personal sacrifice in the the face of others who will do nothing for the innocents. Doing so is the loudest proclamation of the gospel and demonstration of our peculiarity.
We ought never to choose sides among all of the pagan states. We ought to maintain a higher ethic and steadfast monotheistic dedication to natural law.
If the allies really wanted to prevent the Axis from advancing they would have established a strong and effective assassination unit, like Switzerland did. Either that or arm the citizenry.
The Swiss were not attacked because their few assassination attempts failed, deliberately.
First of all, a Swiss sniper doesn't miss. Ever.
These attempts were warning shots to the German officers saying: we can hit you any time, any where. And we are all armed. We won't waste time shooting your infantry. We will find your officers, those issuing the orders, and shoot them. So stay out.
The reason most politicians are opposed to assassination as an effective tool is that they have a gentleman's agreement. (Remember that a gentleman was an individual who had brown-nosed the king into granting him some special privileges.) Their agreement was that they would not kill each other, but instead let their toy soldiers die instead. It was so much more fun to manipulate the lives of others like pieces on a chess board than to get bloody and dirty oneself.
And the fun is in the playing. That's why the USG got involved in WWI and WWII. Europe was throwing a war-party and America hadn't been invited. We weren't part of the Tyrants-R-Us club yet, so we crashed the gig to show that we belonged.
But we didn't belong. The strength of America was in its people and in its liberty, not in its government or military. We were on our way toward increasing wealth and liberty the world over through trade and production alone. But the Roman disease was caught by our politicians, and they decided it would be a good idea to control the money and to tax people's income. So the stage was set for the great depression 20 years later, for involvement in global wars for domination, and for greater concentration of power.
But the state will always act this way. As believers we must set ourselves apart from these methods, and find ways to relieve the suffering of innocents that don't involve violence, or that restricts violence to halting the encroachment of perpetrators.
I have said before that rescue campaigns into places like Rwanda, Darfur, and Nazi Germany to deliver innocents are likely to face less armed resistance than military action that is determined to extract absolute surrender from the opponent. We must look for options such as this one, and resist the urge to manipulate the state into doing the gospel for us. The state is a wolf which will not be tamed.