I think the cash/property grab aspect was there from the beginning, and even in the 20´s you see it manifesting itself on a local level with intimidation etc. Klemperer's, I will bear witness, diaries from Dresden in that period are a fascinating read on the day to day impacts. Then as you say, it escalates culminating in Kristallnacht.
But I think they would never have succeeded if it hadn´t been for the 1929 US crash, and the subsequent withdrawal of loans from Germany by the New York banks in response, which pushed Germany over the edge for the second time.
As to how Germany wins WW2, or at least fights into a Cold War like stalemate. Germany continues the Battle of Britain for another month, rather than switching to bombing London, the RAF runs out of operational pilots (rather than newly trained pilots with 8 hours flying experience who have yet to fire their guns, they had plenty of those.). Or just that the men who made up the Polish and Czech squadrons that had the most kills in the Battle of Britain don´t make it across Europe to fight on for the RAF.
Britain falls, the London government retreats to Canada, Hitler can now turn his attention to Russia, without having to fight a two front war. They might still have lost that one, Russia is big, and would presumably have been backed up by the USA and the remains of the British Empire, but the atom program in Germany isn´t that far behind, and they do have the V3 by 1944, so it hopefully? ends up in some kind of Cold War by the 1950´s. (Essentially the storyline of several alternate histories out there. and the SS-GB series.)
