Our results indicate that climate-change skepticism has not diffused widely in Germany, but that it correlates with less support of renewable energy sources. However, skepticism correlates negatively with political participation, and there is no strong political outlet for public climate-change skepticism in Germany.
Unfortunately, the article "Public climate-change skepticism, energy preferences and political participation" by Engels, Hüther, Schäfer & Held is hidden behind a paywall, but here you find the abstract. Spiegel-online reports on this study and points to the difference between the clear feature and prominence of skeptics in the US and those in Germany, where they show no clear profile and where we have only a few "total deniers". According to the researchers, this might indicate that the "Energiewende" will not meet great resistance, at least not from the skeptics. Does this mean that Klimazwiebel is one of the last resorts where free-ranging skeptics can be observed and listened to? Wow.