Second, the distinction between normative and descriptive statements, as you define them, is not always clear-cut. As a simple example, is which bucket is "I think these doors are the same color" when said about a red and green door? What about (to use your example, but with a slight tweak), "I think all <insert group> are criminals"? Note that the "I think" was implicit in your phrasing, though maybe the implicit vs explicit distinction matters.
Third, even for statements everyone agrees are descriptive there may be widespread disagreement as to whether they are true. Example: "Donald Trump is a criminal." The US approach to this is to generally try to avoid having the government be the arbiter of truth, with some narrow exceptions for libel and the like. The German approach, as you note is different, not least due to different historical experiences. Which approach is better depends a _lot_ on circumstances and culture and norms and so forth. The German one places a lot more trust in the government not abusing it's truth-determination power than the US one does.