The Galactic Police are really called the Guardians. They are made up of the best and brightest and most ethical members of all the races in the Galaxy. They are more of a military than a police force as we know it on Earth, because by the time that most races encounter them, they are Galactic Level Zero Civilizations.
That means that the planet has one basic culture, one basic authority that answers for the population. They provide for the survival needs of every individual regardless of individual merit or 'wealth'. That means food, shelter, clothing, education, medical care and electricity for life support [heating/cooling/cooking food]. The population is free to pursue interests and talents rather than slave labor for survival. There would be no slavery. They are usually telepathic at this level.
Until you reach that level as a culture, you are generally a GA protectorate.
Our people have been overriding this with seances and CE-5 events at least since Sir John Dee made contact with the Enochians in Queen Elizabeth I's reign. That means, we have been inviting in anyone who can hear us for almost 600 years. That is how we got the Draco and the Greys. There are far worse out there too. And if you have invited them it, it takes an armed conflict to remove them--that may destroy your entire population.
So Earth is in a pickle. We have invited in some nasty critters, and are committing atrocities across the entire Sagittarius arm of the galaxy in violation of galactic law. We are nowhere near evolved enough to merit membership in any of the Federations in the galaxy.
Our actual options at the moment are to be trapped in our Solar System until we learn to live together in peace--as a GA protectorate--or be shoved back into the Stone Age to try again. And yes, we have to make that decision as a whole race, not just individuals.
The Germans in space told the Guardians 'eff you', and have had several of their colonies destroyed. Their entire armada is engaged in time travel to rescue those people. They are now following orders and returning the rescued to the Solar System. That is what those ships coming through the Sun's portal are. I am not sure where the people are being taken to resettle. We already have bases and or colonies on all the planets, moons and many asteroids. The Germans are not welcome on Venus or Saturn by the folks that already live there.
So keep in mind that real options are few and limiting.