The police can be stormtroopers in Spain, as there is really no right to own firearms, and everything must be licensed and each license is difficult to obtain.
Therefore the police can run amok and few can stop them. The “citizens” have no real way to fight back.
They can do that here in the US too…..once. Then the citizens can take the offensive if the need arises.
Let us hope we never get to that point here.