Reminders of World War II

On a plaque affixed to the front of a boy's school in Paris I walk past every day:

The plaque reads:

A la mémoire des élèves de cette école déportés de 1942 a 1944 parce qu'ils étaient nés juifs. Victimes innocentes de la barbarie nazie avec la complicite active du gouvernement de Vichy. 

Ils furent exterminés dans les camps de la mort.

And in English:

To the memory of the students of this school deported from 1942 to 1944 because they were born Jewish. Innocent victims of Nazi barbarism with the active complicity of the Vichy government.

They were killed in death camps.

We constantly see these reminders of the horrors of war. I wonder how the US would be different if it had experienced these horrors on her own soil and had these reminders everywhere?