I'm gonna take a moment to explain why the Sentinels Alien Races was such a stupid idea.
My explanation goes beyond the stupid character designs. In Robotech it is suggested that the Robotech Masters ruled all. They have the Zentraedi warriors who destroyed all. They're arch enemies the Invid nearly destroys who use protoculture. We've seen what the Zentraedi have done to the Earth. Why did the Masters, Invid & Zentradi let all these losers live? I want a good reason besides so Robotech could eventually have a rip off United Federation of Planets.