German intellectual thought has the ideal of "Bildung". Anna Wierzbicka tells me that "Bildung" is a particularly German construct. According to it you learn about different view points and then you develop a sophisticated opinion. Not having a sophisticated opinion is low class. In liberal social circles in the US a person who agrees with what the Democratic party does at every point in time would have a respectable political opinion. In German intellectual life that person would be seen as a credulous low status idiot you fails to develop a sophisticated opinion.

I've actually been told, by someone with more social skills than myself, to stop articulating complex political opinions because it makes me seem indecisive and weak.

If we were just talking modern politics rather than philosophy, then, well, apologies for being tactless, but I would suspect that the difference is that in Germany, showing too much loyalty to a political party is a reminder of Nazism. The US hasn't had similar authoritarianism, so there isn't the aversion to excessive party loyalty. Moreover, if German culture has always rewarded more balanced, sophisticated political views, then I am surprised that fascism did take hold in Germany.