To say that the headline was an overstatement is, well, an understatement. Never mind the language used in the article (there was no geographical entity called "Judea" in 1933 and certainly none that had the power to declare war, and the world's Jews are referred to as "Israel," which is not even a liturgical usage), it is riddled with inaccuracies. The largest of these is that the entirety of the world's Jews took part in this boycott. It should be borne in mind, e.g., that Germany's Jews themselves (numbered at 600,000 in the article itself) certainly could not participate in the boycott. Furthermore, the yishuv (pre-state Jewish settlement in Palestine) entered into negotiations with the Third Reich, ultimately entering into the Transfer Agreement in 1935, which would have been in flagrant violation of any worldwide Jewish boycott of Germany, real or imagined. The Jewish population of Palestine in 1931 was 175,000; it is only logical to assume that the population was larger in 1933, and, in fact, another 50,000 Jews emigrated to Palestine before WWII as a direct result of the Transfer Agreement. Thus we have nearly a million Jews in Germany and Palestine alone not honoring any boycott of German goods.