Charles, that scene involving T proved to be important. In many ways she embodies Nazism, in that, yes, it could appear 'acceptable' and 'reasonable' on the surface and did to many people across the world for a very long time. However, even before the war, we know they were doing horrendous things, that those paying attention picked up on, even if they were not listened to.
The thing about T is that while she may seem laughable to us, she is a true believer and everything she does and say comes from her strong convictions. I have been watching Babylon Berlin recently and it reassured me that it was right to show fanatics in the Weimar period who really lived in a different mental world to people around them.