As a sibling comment points out, they got only 30% of the votes and they came into power only thanks to the broken political system that allowed the president t

As a sibling comment points out, they got only 30% of the votes and they came into power only thanks to the broken political system that allowed the president to appoint whomever (on threat of dissolving the assembly), political manoeuvring by a guy who thought he could control Hitler (von Papen, and spoiler, he couldn't) and the previous guy on the job (von Schleicher) insulting the wrong people.