What Hitler did was to basically tell the German people to stop feeling sorry for themselves and start working together instead of going at each others throats, the basic rhetoric of any third-rate motivational speaker. Unfortunately he did that by putting the blame for Germany's problems on the Jewish race and others they saw as impure. If I'd been there in your shoes I would have pointed out the fact that whilst having food on the table in those times may have been a good thing, it wouldn't have done much good if for some reason the Nazi regime arbitrarily decided that they themselves were impure or immoral and had to be summarily eliminated, say because they found out that somewhere in the distant past they had a Jewish ancestor.
Lets say those people somehow had survived being thrown into a death camp and were talking to you at that point - I think they'd have a slightly different viewpoint.
In summary, as much as they would have enjoyed their plentiful food and jobs, the overall outcome for humanity far outweighed any benefit the individual. Also keep in mind that Hitler was ultimately a destructive personality and in fact achieved his goal of revenge on his parents through the destruction of Germany itself.