Just move west. Many Indians were killed due to illness by deseases from Europe. Although these deseases were a welcome to the settlers, it was not their first intention to kill all Indians. It took a much longer time for the settlers to kill as much Indians, as it took the nazis to kill the same number of people. It is a strong warning to stop the nazi-threat right here and right now.
Nazis rise in quite a different situation.
Well, the most sensitive thing for them to do is to protest against the capitalists who own the industry and who sack the workers. But when unions are strong, capitalist might call for stronger measures like organised fascist gangs to break up strikes and union meetings. Capitalists always need to compete on their market. For them it's best when a competitor is removed. If needed, by force.