Backtracking a bit, it seems as if with every game Devan's plots become more and more deranged. His first scheme is, of course, to hold Eva hostage so he can gain control of Carrotus. Evil? Yes. Particularly insane? Not really. Then when Jazz shows up, he builds his Twin Mega Battleships to destroy Carrotus. Now, Devan may hate rabbits, and rabbits may not treat turtles as they would other rabbits, but blasting an entire planet? That doesn't sound like a mere "revolutionary"'s actions. Then after his defeat, he builds his time machine to go back in time to wipe Jazz from the pages of history. This is where I can see that Devan's totally lost it. Time travel is a dangerous thing, and it's very possible, even likely, that he could have caused massive damage to the time stream: all to settle a grudge. Plus there's the whole "Devan goes to Inferno and becomes Devil Devan" thing. Although we don't really learn much about this event, or when it happens (JJ2's plot in general is sketchy and doesn't make much sense. Personally, I thought JJ2's storyline was unfinished. I imagine that it was originally intended for Bilsy to be the boss of Dam Nation and for the plot to continue after that and tie up some loose ends) but it still doesn't seem very "sane". So while there may be problems between rabbits and turtles, Devan's viewpoint doesn't seem very trustworthy. Devan may see a problem, but I imagine his insanity blows it out of proportion. Which again is a strike against the "rabbits=evil turtles=good" theory.