Thumbs up for this coming from the conservative party as well. As others have said, this really is a bi-partisan issue and we should build as broad a coalition of the unwilling as possible.
I do not expect to much. Our governments are extremly careful not to interfere with US interests. Stasi documents about the CIA? Unlawfully given to the CIA and not published. The man responsible is now the president. Merkel, started her career in the pro-dictatorship eastern CDU. Worked for the FDJ (somewhat GDR equivalent to the Hilter youth) as PR manager.
Not doing anything against the abduction of Kurznatz by the CIA. "Opposing" the Iraq war, but allow the US air fields to operate. It goes on and on and on. This is just a little rethorics. See also: Isle "facebook" Eigner.
We have elections in September, and this is an issue where they can't do anything, don't suffer in any way, but have a chance for free friendly press.
Meanwhile, the same conservative party added biometric photos and fingerprints to official documents (mandantory on some, optional on others); happily sends over flight and banking data to the US (they were in favor of the SWIFT agreement); established their own flavor of communication data ("metadata") retention policies ignoring both arguments and protects; collect traffic data "for street charge purposes only"; now want to use both for tracking down increasingly minor offenses (despite originally arguing that this wouldn't ever happen, and opponents to those laws are paranoid when assuming so much).
So yes, it's great that they oppose PRISM (if only to keep the topic in the media). But it's probably just out of jealousy because their own implementation is so much weaker.
