Why die for Danzig?

Sarah Honig gives some historical context for President Obama and Secretary of State Kerry's mendacious treatment of Israel.

*Even the definitive end of “the Czechoslovakian problem,” didn’t end
Hitler’s provocations – as the appeasers had trusted it would. Hitler
robbed Europeans of “a nice quiet sleep” with yet new demands. These
involved the Free City of Danzig, a semi-autonomous entity