You're saying a lot here so it's a bit tough to respond specifically. But my point is the following: the danger police has decreased hence any talk of increased danger is certainly wrong. There may be a _perceived_ increase in danger, but that's not the same thing.

It seems pretty clear (to me) to be cultural. Not cultural in some static sense (e.g. American vs Swiss), but cultural as in the culture of policing in the US has been changing over time. Our police has treated American citizens as more dangerous while the opposite is true. The real question is why. Why have Americans idea of the level of crime in society so diverged from reality? Can this be reversed?