> I'm pretty sure people in Germany though they were stopping the fascists by supporting the Nazis.
You'd be pretty wrong. At best they thought Hitler would soften greatly after he rose to power, at worst they agreed with everything he said and did.
In '33 German non-Jewish shops started putting up "German Free" stickers. Einstein fled the country in that same year. His photo was widely published in newspapers with "not yet hanged" as the sub-heading. His friend, Theodor Lassing, was shot and killed, an act that was celebrated in Germany.
Hitler had been imprisoned for his actions before his rise to power, and was a largely known entity before the Germans "turned to him". There wasn't a lot of confusion about what he thought, who he hated, or what he wanted to do with them. Mein Kampf was released in 2 parts across 1925 and 1926.
An actual criticism about the time just before Hitler's rise to power, is that every other powerful party took him for a joke. They didn't expect him to be a viable rival. So instead, the Communist party (one of the major parties at the time) spend their squabbling with the Socialdemocrats instead of focusing their attention on the "real enemy".
If you're actually interested in this topic, you should read the book "They thought they were Free". It chronicles how normal people fell to support the fascists - the Nazi party.