Earlier quoted context omitted.
> I'm surprised by the implication that the authors think European politics is US politics expressed using a different idiom. I think they meant another dimension than you. I've looked into the underlying value systems in the US and Germany as part of my phd, and the underlying moral frameworks are essentially identical: there are two basic ideas of how a society should look like (the progressive and the conservative…
There are plenty of exceptions to that dualism in Europe though (coexistence of social conservatism with strong ideological commitments to extending social protections and state involvement in industry in many significant European political parties and arguably even more widespread in public sentiment in many European countries) which are relatively rare in US politics.
But those can mostly be explained within each moral framework (e.g. social conservatism is keeping the us vs. them mentality: "no social benefits for immigrants" or similar).
Keep in mind these are not totally coherent, precisely defined theories, but instead are formed subconsciously by growing up in a particular social environment.