I find it interesting that your comment centers around principles and justice. There are thousands of young people who are dying in trenches and blown to pieces by drones each week, and have been for the past three years. You don’t even mention them.
Well, see, we learned nearly a century ago that when someone aggressively expands and you give in to them to maintain "peace in our time", you don't get peace for very long. You wind up with more dead bodies, not less.
Fighting when it's needed leads to more dead this week than abject surrender would cause, but if history is any guide, it leads to fewer dead bodies this decade.
What AnimalMuppet shows with the failure of "peace in our time" is how speaking softly only works in combination with a big stick, to paraphrase a different politician from a different continent around a generation earlier than "peace in our time".