Wait didn't Picard say that the Federation respects people's sovereignty and right to self-determination a few times on the show.
Starfleet remove a group of migrants, from a planet that wasn't theirs, so they would not be harmed?
(Ensigns of Command)
And don't forget, at no point in the movie do the Baku state that they consider the ring planet to be "theirs." This comes solely from Picard.