He wouldn't understand strategy without the beerhall putsch. Without it, he wouldn't have had those nine months to think through things, and then to plan his grand strategy for the future. He wouldn't have his plan to conquer Europe and Russia, he wouldn't have been able to understand that without a party willing to take on anyone and everyone (with a few exceptions, i.e. jews, gypsies, etc.) he wouldn't have been able to take power the way he did.
ITTL Hitler was promoted to HQ to work as a mapmaker and aide. He's heard plenty about strategy and tactics during that time.
Germany was under attack/occupation east (Poland) and west (France) after 1918.
To Hitler, holding the line is the most important thing because no matter how grand your strategy, they're pretty empty if you can't even protect your own home.
Also, by declaring a guerilla war on the French occupation, he gained a lot of popular support from the Germans living in the occupied areas (Rhineland, Ruhr, and Saar).
By using the same tactics the Polish Military Organization used in Silesia against the French, the SA and SS is bleeding the French occupiers, raising their occupation costs while defiance from the German population in the occupied areas make it certain that the production and the quality of products is very low there.
With little goods to seize, the French debt increases significantly because they can't seize enough stuff to pay for the occupation.
The use of guerilla warfare by the Nazis and their SA/SS will have bigger consequence down the road.
And arguably, Mein Kampf is just a load of random BS pieced together at random.
ITTL Hitler is talking, but he's backing up his rhetoric with action. Expedition Silesia and OP Elbe are proof of that to the German people.
The Nazis are willing to take on the French and the Poles and they had the support of the Inter-Allied Commission in Silesia and international sympathy after the Massacre in Bonn.
To your average German citizen back then, they were pretty badass, taking on Germany's enemies and winning right after the devastating defeat of WW1.
The Nazi Party backs Hitler because he's successful and calls for action instead of just empty words like other German politicians.
Hitler ITTL is more practical and he's focused on what's in front of him.
There will be more about Adolf's plans and thinking in the next chapter, as well as info on how OP Elbe is proceeding.