Resistence is too late. There was opposition before the nazis gained power.

https://en.m.wikipedia.org/wiki/Reichsbanner_Schwarz-Rot-Gold

German site says 2.5 million members were organized mostly by SPD, with 250,000 in the elite units.

They are mentioned as opponents to the SA:

https://en.m.wikipedia.org/wiki/Sturmabteilung

Its primary purposes were providing protection for Nazi rallies and assemblies, disrupting the meetings of opposing parties, fighting against the paramilitary units of the opposing parties, especially the Roter Frontkämpferbund of the Communist Party of Germany (KPD) and the Reichsbanner Schwarz-Rot-Gold of the Social Democratic Party of Germany (SPD), and intimidating Romani, trade unionists, and especially Jews.

By the time Hitler assumed power in January 1933, SA membership had increased to approximately 2,000,000

Strangely there is no information about the conflicts. This is what I found, on the site of the communist units who also fought the nazis.

Since the strategy of the SA was to fight and provoke, violent encounters between the RFB and SA soon became a part of everyday life.

https://en.m.wikipedia.org/wiki/Roter_Frontkämpferbund

What we’re seeing with the current fairly widescale open resistence is far beyond anything that happened in Germany.

If it is not clear, it’s the other way round.