I want to call attention to three crucial distinctions that I seldom see made, but which are disastrous if conflated.

1. Evil versus immorality. Evil is acting with sadistic intent to harm or annihilate. Immorality does not intend suffering, harm or annihilation, but it tolerates or supports what does harm, and sometimes even tolerates or supports evil. When evil and immorality are conflated, moral judgment loses a primary point of orientation, and well-meaning people can be manipulated to tolerate or even support causes whose only goal is sadism, harm and annihilation. The passionate revulsion humans naturally feel toward evil is channeled into whatever examples of immorality capture their attention (whether injustice, indifference, disrespect or tribal animosity).
2. Authoritarian versus totalitarian. Authoritarians attempt to tyrannically control what individuals do (and do not do). Totalitarians attempt to tyrannically control not only what individuals do, but also how they think and feel. Totalitarianism is not authoritarianism taken to an extreme; totalitarianism has the aim of displacing intuited reality with its own constructed truth, and it has its own path of development. When totalitarianism and authoritarianism are conflated, the visible brutality of authoritarians can be used to divert attention from cultural propagation of totalitarian ideologies through propaganda and indoctrination.
3. Moral explanation versus justification. Moral explanation is descriptive, and causally accounts for the thoughts, attitudes and actions of an individual or group. Moral justification is normative and morally assesses the thoughts, attitudes and actions of an individual or group. When these are conflated a sympathetic description of how a person or group became evil can be passed off as a justification of evil.