I would also add to the points made in the posts linked by /u/TriggerHappy0071.
From its outset, Weimar Germany was forced to deal with coup attempts from both the left and the right. The SPD, leading party of the Weimar Republic, and the rest of the parties dedicated to democracy were forced to choose between threats on the left and the right. They tended toward a sort of acceptance of anti-government behavior from anti-government rightist groups which helped deal with the leftist uprisings.
Primarily, "Free Corps" were right wing extremists paid by but not loyal to the government. Since the Weimar Republic could only have a limited military, it used Free Corps to put down socialist/communist or other left leaning revolts. These Free Corps, including the SA, held some sway certain German states, such as Bavaria. Hence, to act too harshly against Hitler COULD have led to a dangerous loss of (nominal) support of the Weimar Republic by the right.
However, the judges were most certainly more influential in the immediate sentencing and nature of the trial, there were many political considerations.