> Was the Nazi public more informed than the rest of the world?

Yes, actually. I believe many Nazis knew more about what was going on during the Holocaust than most of the world did - the world only really understood what was happening after WW2.

> Just as Germany today isn't an "expert" in genocide because they committed it,

We're not talking about Israel 70 years from now. I'm talking about people who are there right now and tell us, in real time, what is happening.

> They're literally living on stolen, ethnically cleansed land.

The land wasn't "stolen". As for whether there was ethnic cleansing, that's a much debated topic. It is also, unfortunately, the sad reality is that about 100 million people worldwide have been ethnically cleansed since WW2, many of them (though certainly not all) in the aftermath of WW2.