If there is no collective guilt, then the guilt, as I believe, resides in every participating individual. Herr Hitler did not march through Poland; thousands of male Germans with lucidly conscious intent of murder, theft and destruction marched through Poland.
We are responsible for our actions regardless of our God, our country, our government, our family. It is never necessary to participate in sin just because everyone else is doing it.
A realization, I hope, from the speeches at Bitburg, is that we are ever responsible as individuals and our guilt is not transferable.
Should it ever happen when an aggressive government calls a war and nobody comes, then society, mankind, will have arrived.