Promises, promises. By politicians. The oath of office (like: to serve the public, protect them from harm, defend the constitution) is their first lie, after that it gets only easier.
You already have one of the most conservative and restrictive laws in Europe, including data preservation which never helped avoiding any assault. Is that your "liberté", to get rid of privacy?
Power will be abused. Because they can. Requires judge reservation? That can be circumvented. Requires a major crime? That can be constructed. Who would sue the mighty? They make the laws the lawyers turn against you.
Too much that should hardly ever happen, already happened for the smallest reasons. And a just even avoided assault is one of the best reasons to let the people want to surrender public rights for the promise of a bit more safety when the next assault comes. Cui bono? Are secret services really interested in preventing terrorism? If terrorism was extinguished, who would still need secret services anymore?
By the way, this era is so perverted, you are already blamed being an extremist when you are against war. Because nothing creates more profit than war. Germany wouldn't be top exporter in Europe without selling military equipment. And who pays best? Israel, Saudi-Arabia, Egypt, ... the most peaceful countries in the world, seriously.