How do we evaluate people acting good vs people acting evil?

Do we understand the difference when we're perceiving people as acting as one vs the other?

Is it because of the end result of their action, or because of their particular desires?

Is it the limit of suffering they're unphased by?

To compare one acting good vs evil, being aligned with good. The degree of sincerity with which one uses to peddle a lie?

To compare good and evil is a rough generalization, indeed, but it becomes most pertinent when examining collectivists and collectivst thinking. Collectivist systems have a seemingly inevitable characteristic of coming to invite and inspire its members to ridicule and dehumanize others. Thsi might sometimes escalate to the point of calling for people's death, but it often includes ridiculing for someone for their suffering.

Beyond mere Schadenfraude, it manifests to the point of hate and perceiving someone's continued existence as something abhorrent and inappropriate.

How do we begin to understand what not only causes a person to wish for pain and suffering on another, but to understand how this manifests as a collective phenomenon?

There is something to be said for the manner in which one invites collectivist thinking.