The belief that your political enemies are uniformly evil is ignorant of human nature and the nature of virtue. To be evil requires knowledge of the superior and willful disregard of it. Only a small elite in every group possess such knowledge or even the ability to possess it.
Very true. But mens rea is usually considered a component of guilt. We might differentiate between malicious evil and accidental evil, perhaps, but that's not what I would consider evil. Om Svabhava Shuddha Sarva Dharma Svabhava Shuddho Ham