I don't see it as a choice. We can't allow imperial ambitions to lead to the conquest of peaceful democratic nations. Appeasement never works - they already took the Sudetenland and now they want the rest of Czechoslovakia, and then it's on to Poland the new "almost guaranteed hostile next door neighbor".
While Poland would certainly be the most appropriate historical mirror, I'd expect some more southern action and the Baltic States to be targeted first.
Last night as I lay in bed, looking up at the stars, I thought, “Where the hell is my ceiling?"