Greg, others have commented more informatively on guns against fascism and I can only add that the Jews who could get out did and those who couldn't went to the camps. There was no other way. Fascism was wildly popular in Germany. Any notions of armed resistance must consider Warsaw and, to really put a fine point on it, the early French and British military performance against the most professional and powerful forces the world had ever seen. If the Brits, if the 51st Highlanders couldn't make a dent, how could the Jews?