Erm, ASB buddy. Fringe parties led by obviously deranged men who waste all their time in Bavarian beer halls aren't going anywhere. Weimar Germany's electorate, even in it's infancy, is smarter than you give then credit for. And they certainly wouldn't elect a party filled with alcoholic demagogues even if times were tough.
Tell that to the Russians in the 40s.
(OoC: OP said WWI, which implies a WWII)