Is there reason to believe that the general German population viewed the Nazi concentration camps any differently than the American population viewed the "Japanese-American internment camps" during WWII?

It’s a question of What did they know, and when did they know it?

If the US government had chosen to exterminate Japanese-Americans rather than segregate them, how much of the American population would have known?

“Succumbing to bad advice and popular opinion, President Roosevelt signed an executive order in February 1942 ordering the relocation of all Americans of Japanese ancestry to concentration camps in the interior of the United States.”