To industrialize by making use of the massive supply of cheap labour.
The only amendment that has been repealed is prohibition.
It was repealed because it was hugely unpopular, totally ineffective and a large factor in increasing the power of the Mafia in the USA.
It was passed in the first place because of misguided nonsense paraded by well-meaning moralistic busybodies.
<span>Sort of like the war on the (rest of) drugs .... except many of those are still illegal and they were not part of a constitutional amendment.</span>
They gave more control to the States than the actual Federal Government.
This was intentional due to the colonists not wanting a strong central
government and cause a repeat of England's rule. This proved to be
inadequate because the federal government was unable to regulate taxes
or even gather an army to help with disputes. These flaws in the
Articles were shown with Shay's Rebellion as the Continental Army
(federal government's army) was slow to organize and confront the
problem. They did not give congress and national government enough power. It also did not give congress the power to tax, which caused the government to print more money, and lead to inflation. Another valid reason why the Articles of Confederation was inadequate, it did not give congress to the power to draft troops.
I'm sure there are several different ways you could answer this, but I would say that surrounding countries (namely America) were apathetic and indifferent to the massacre in Germany. During ww2 America prioritized military victory over humanitarian concerns.