Like hell they aren't. Citizens actually do have the right to detain others, or halt crimes in progress, and the US is the only country I know of that still does high speed chases, because it's a stupid and reckless policy that creates an even greater hazard to others. One thing I noticed when I came back to my hometown is that the cop cars here no longer have the decals saying "To Serve and Protect", because that's not what they're about. They're all for violating every portion of the Bill of Rights that they possibly can by tear gassing protestors the mayor doesn't like, enforcing gun laws that infringe on our 2nd amendment rights. They illegally search and seize property when the "suspect" is of weak enough character to be intimidated by a badge and so on. They oppress the People of the United States, and stand for everything we fought against to become a nation.
Authority is not granted, it is a contract between the populace, and those in positions of authority. If those in positions of authority abuse their power, the populace is well within their rights to not only reject, but oust the offending party, since the offending party has breached their end of the bargain. When you act like the right hand of tyranny against the citizens of the United States, you have breached that contract, and reap every consequence you have coming, and that's what this law is.