I think that's a little simplistic, I have liberal (in the British English sense) views specifically because I think humanity is fundamentally flawed. If we are all flawed particularly when it comes to wielding power over others, it's self-evident in my opinion that governments should be limited and the total power any individual or institution can amass should have a hard ceiling. I see explicit anti-authoritarianism as a necessary counterweight to our flawed nature, every exercise of political power is potentially harmful but through the ideas developed in the Enlightenment it can at least be contained and controlled.

Humans are inherently flawed and they're inherently kind. We're evolutionarily primed for competition and cooperation. Antisocial behaviour can be both inherent and environmental. I feel you might be setting up a false dichotomy when the motivations for political beliefs are often pretty complex and varied.