What is the meaning of the road to Auschwitz was built by hate and paved by indifference?

The story of the holocaust is full of grand phraseology with no particular meaning. For example, the story originally involved a million Jews, then three million, then six million, and then it was discovered that the borders of the country had been moved and that accounted for most of the varying population figures. You will also find that in some countries it is a felony to question the official story in any way. Even in the USA it is a social crime.

I suggest you keep studying and don't expect everything to have a clear meaning. Here is a list of articles: fee.org/search?q=holocaust