Justinian
Banned
For the Reichswehr you're right; but note that democracy wasn't helpless against paramilitary activities, since the democratic parties had established their own militia, the Reichsbanner Schwarz-Rot-Gold.
No, that's not true. The Kapp-Putsch was the action of some poritions of the Reichswehr and of the Freikorps, former units acting on their own. The leadership of the Reichswehr, which certainly had sympathies for the putschists, stayed neutral and refused to defend the government - but it didn't take part in the putsch.
In November 1932, one third of the Germans voted for the democratic parties Zentrum and SPD. Furthermore, Hindenburg had been elected with the support of the democratic parties.
I think you underestimate the support for democracy in the German population. Most Germans supported the republic until the Great Depression and Brüning's austerity policies. Poverty and unemployment lead to the great gains of the Nazi party in July 1932. But the situation improved and the Nazis already lost a great number of seats in the November 1932 elections. It was bad luck that Hitler was appointed chancellor in January 1933. In the long run the NSDAP would have lost its strong positions to more moderate parties.
The Reichsbanner Schwarz-Rot-Gold was in no way capable of standing up to the right wing paramilitaries on their own, let alone against the Reichswehr. The Reichswehr itself was very obviously sympathic to the putsch, they were simply biding their time waiting to see in what direction the coup went before declaring their support, they wanted to avoid a civil war at all costs. The right wing by the 1930's became much more powerful, radicalized and entrenched in the increasingly radicalized german population. My argument that a right wing government is inevitable isn't necessarily made because of the support of the German population, but rather that of the military itself. Hindenburg made democracy palatable to their preferences, but he was obviously on his way out. There was very little preventing them from simply seizing control of the state apparatus, especially with the assistance of the DNVP.