A lot probably depends upon the age of the person being asked.
If you were an eighteen-year-old who perpetrated atrocities in 1945, then you would be 82 today. It sounds like a long time ago and far away.
If you were an eight-year-old in 1945 and your family was murdered in the camps, you would be 72 and without living relatives. It might not seem so long ago or so far away.
Without government action to hold people accountable for such crimes, we would have to leave it to the victims. Most consider that a bad idea.
Foreigners killing foreigners. European history.
What about all the American issues related to the Japanese and the communists and the deaths and murders of Americans. When does our American tax dollar funded, endless, timeless, relentless, pursuit of that start?
Do the communists that killed a 100 million people ever pay, when do we start that process?
Do you believe that the US Justice Dept should have a special unit to find and prosecute every villian responsible for henious crimes and the hundreds and hundreds of millions of deaths due to political and sovereign state actions anywhere in the world during the last what 75 years or so? Are you really serious?