Other, similar organizations from other countries often at least try to maintain the illusion of some degree of objectivity. If you take advanced French classes at the French Institute, there is a good chance that contemporary issues affecting France will be discussed in class.
Indeed, when I took German at the Goethe-Institut there was a fair amount of class-time reference to social problems in Germany (although perhaps with an optimistic spin, something like "Germany is great because Germans acknowledge important social problems and work to solve them¹"). I haven't experienced the Confucius Institute for comparison.
¹ It seemed like nearly every course had a dialogue on the theme "Was machen Sie für die Umwelt?" ('What do you do for the environment?').