No, that's pretty corroborated, that most of the soldiers didn't know the extent of Nazi atrocity until they were either involved in liberating a camp or until the war ended and it all came out. I think there was enough information out there for them to know that something seriously wrong was going down, but not the sheer scale of it.

Even aside from the Holocaust, however, there was a lot happening and not a lot of it was communicated publicly or quickly, especially to enlisted men. Troop movements, classified information, etc. And certainly nobody at the time was doing the in-depth analysis of it that came along after the war.