Umm, the CDU/CSU is the German equivalent of the Republican Party. The SPD is the equivalent of the Democrats.
Whatever. They're the party that wants to let hijacked planes be used as bombs to kill thousands of people, instead of shooting them down and losing a couple hundred people. That makes them nutty in my book. We already saw what these hijackers can do with the WTC. Would any sane person suggest, knowing what we know now, that it wouldn't have been better to shoot down those planes? Which, by the way, flew through the airspace of 4 different states on their way to the WTC. So no, leaving the shoot-down decisions up to state governments, which don't exactly have their own fighter jet squadrons, is hardly a sane alternative.
Maybe a bit late, but may I clarify this? The CDU/CSU wants to complain at the Constitutional Court because the law lacks a legal basis in the constitution, they say that the parliament has no power to make such a law allowing the killing of innocent airplane passengers. The CDU/CSU rather wants a change of the constitution (majorities for that won´t be a problem, since all big parties support such a law).