The colonists are quite free to feel "angry" or "not happy" or whatever about the situation. If they decide to start an armed rebellion
over it, their homes deserve to burn brightly.
What happened to sense of proportion? In the Trek universe, these people belong to a mental hospital. In our universe, they would be jailed for years, and even if their territories were later reacquired by their native country, the lunatics who had served their sentences would hopefully be prevented from trying to benefit from their crimes by banning them from ever getting that land back.