I did not mean I personally need this questions answered; I think I know quite a lot about this time, from school, books etc.
But that does not mean there is no reason literature (or comics) should not address this topics; in fact, what I meant is that Ultimates seems to suggest misleading answers, even if certainly no one will take the aliens stuff seriously.
In the second half of the 1920s, Germanys economy was quite healthy again, only after the stock exchange crash of 1930 it collapsed again.
And the german government even secretly decided not to fight this very much so that they could pretend the country was now so poor that they were not able to continue the payments of the treaty of Versailles - but this caused mass-poverty which helped Hitler.
But there were a lot of other reasons for Hitler's rise, many of them caused by the way Bismarck unified Germany after the war with France in 1870/71. This victory was glorified in an extreme way, so that most people expected another easy victory in 1914 and were not able to accept the defeat.
The glorification of Bismarck, and the fact that democracy was not popular in germany at that time, made a lot of people think they needed another "strong leader".
But I don't want to bore you with a history lecture...