True, as I said, Karl may not have a problem with uniformity, provided that it isn't uniformity to bad ideas, like the Nazis ideas.
Diversity of thought is a good thing but it can also lead to people holding viewpoints that are incorrect or downright stupid, and that can also lead to progress being stifled.
Karl has traveled to multiple universes and has seen societies that lack uniformity, and while he may think that while the defeat of the Nazis was a good thing there, the lack of order or uniformity is less appealing.
Not saying that he's right, just that this is probably why he likes uniformity as a concept.