When I read about past police states (3am door knocking by the Gestapo, Stasi, KGB, etc) The myth was that they were brutally effective in repressing dissent. These dimwits only have the brutal part down.
I don't know that there is a definitive line to cross that makes you say, "I live in a police state now" but when masked gunmen can routinely brutalize the public, citizen or immigrant alike, with impunity, you have reached that point.