The point is: that goes also for criminals, and prisoners. And yes, it should go for refugees too, even brown skinned ones. Oh, and people on social security. And disabled people.
We did a lot of violating human dignity in the past, that's the reason it's the first article of the constitution. It's a good principle. One that many other constitutions don't have. We can be proud about that.
However I don't think many people grasp the implications of it not being uphold, unless they become a victim themselves, and I believe that a large part of the population does not care or will be favorable towards dignity-violations, especially against the most heinous of criminals, and minorities.