America should be a melting pot because with more and more ethnic entities, a lot of people have learned to be open minded, and have learned to respect and learn about other cultures. It also provides workers to boost the American economy. Illegal immigrants or not.
Hope this helped!
This is because he was trying to conquer Europe over all, so he could make the "perfect" country, and have everything the way he wanted it, and in complete control over the entire situation.
