Originally Posted by TheRageOnTheRoads
And in essence when you get down to it the Decepticon's cause was no less geared to the protection of their species than the Autobot's. The Fallen/Megatron simply saw the world in and overly simplistic kill or be killed way (ironically exactly the mentality the autobots adapt in ROTF). There is nothing bad or irrational about that. You see that kind of thing play out in nature the whole time. They simply sought to eradicate all other life that could pose a threat to their species and ensure their own survival even if it meant blowing up a sun, killing others of your own kind. The ends justified the means.