I know that in those days the Nazi party was not as popular as it came to be later, but let's suppose that Hitler's biography was launched in 1920 and Hitler was smarter, so he would wait until 1939 to invade Poland etc.ec.
If the Beer Hall Putsch is successfull and at least Munich and part of Bavaria is taken by the Nazi but
...
French and Belgian Armies invaded with british blessing and Poles take control of various parts of eastern Germany. Probably even the Czech or the Italians can be involved.
Entente troops crushed any armed opposition and took every steps to stabilize the country by killing any armed opponents or sending them to some backwater french or belgian colonies. Various parts of Germany are occupied for the next ten years while without US investments, poverty and communist destabilisation are on rise.
Parts of Germany were invaded IOTL. But ITTL the Dolchstoßlegende is vulnerable: Hitler, not the democratic government, causes the desaster.
Of the Entente powers realize that they have no interest in an unstable Germany. They did learn the lesson after WWII, despite Germany had given them very, very, very good reasons to ignore it.
Well the Weimar Republic will not go without a fight and the destabilizing factor is some austrian born corporal at the head of a party with a very socialist wing.
So accusations of the Red Plague will be quick and the Entente will bring down the brownshirt thugs even if parts of the Reichwehr is with them.
I even believe that the monarchists and the traditionalists right-wing parts of german opinion and political parties will not support the Nazi but fight them fearing some communist manipulation.