Answer:
1. In factories more stuff was done by machine vs farm where you use your hands more
2. It was less demanding on farms they did not need as many people to work on a machine where as in a factory they had kids slaving in hot conditions just to feed their family.
Benito mussolini was a severe nationalist aka fascist which hitler looked at like a hero
For 4, I’d say the best answer to that would be tradition.
There is no law or amendment set in place that designates the Capitol as the place where inaugurations are to be held.