Eradicate the Jewish people
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.
Most of the scots irish who came to the colonies were farm laborers or tenant farmers who were leaving behind droughts and crop failures
Germany as after WWII the "Iron curtain" was dropped by western Europe in an attempt to staunch communism.