You're making the same mistake that lots of people do, looking at the big events that make the news instead of actual crime stats. The former doesn't really tell you anything about crime rates.

This is a big problem that leads to things like these surveillance measures, because people think crime is really high even when it's the lowest it has ever been, because of the media environment.

I'm not American so please educate me if I'm wrong but haven't y'all had school shootings every single day for at least a decade or something?