I think that centralization of power is a spurious correlation. It may be part of the equation, but there is more to it.

Norway has a single national police organization which extends the local level. It is well-regarded by the citizens who are also big on free-range parenting. In Oslo you can find teenagers practicing skateboard on the steps of parliament during the day. On the other hand Americans might find certain means of protective services, for adults and for minors, overreaching.

Also, didn't absolutely everybody in the US rally around James Comey, during his unjust firing?