The Nazi party was banned in 1923, and the ban was lifted in 1925.

So, not really.

...and you don’t think that those two events are related?

It was a time-gated, 2 year ban. It wasn't lifted 'just because.'

During the period that they were banned, they formed a shell party, the National Socialist Freedom Movement, which won a stunning 6%, followed by 3% of the vote (In the two 1924 elections). After the ban was lifted, the next election was in 1928, where they won 2.8% of the vote. Much good that ban did them, eh?

I'm not sure how your point follows from the facts.

Point taken. The meta point still seems to stand though, which is that bans are ineffective.

By a compliant judge as was the trial of the putschists Hitler was allowed to use the trial as propaganda and got a very soft sentence.

I suppose the moral of the story is that if you have enough of the judiciary in your pocket, then being a banned terrorist organization does not preclude you from eventually winning a minority government, and staging a coup?