Answer:
By charging the war leaders with war crimes.
Explanation:
The basis of the Nuremberg trials were the violation of the
1. Geneva Convention of 1864
2. Hague Convention 1899-1907
the rules for conduct of war were set by these conventions.
Some of the charges were:
1. crimes against peace
2. Planning, initiating, and waging wars of aggression
3. War crimes.
4. Crimes against humanity.
The trials brought the Holocaust to an end with the trial of 21 german leaders, 12 of them were sentenced to death, 7 to life in prison, 3 received temporary prison sentence.
He wanted to end slavery at the same time
5 Lincoln did not appear on ballots in the south
While there can't be a definite answer, there is an explanation. America is generally a diverse place, as it is the country of immigrants. This brings in a mixture of culture.
Certain cultures may have hate for others, which can generate the hate you see. Another possibility is the idea of the silent majority. The amount of people who spread hate may be in the minority, but their voice is so loud they may appear to be the majority. =)