" There are varying degrees of evil in the world. The distinction between levels of evil is perhaps the primary moral responsibility incumbent upon each of us. Every child knows that cruelty is bad and contemptible, while its opposite, compassion, is commendable. That is an easy and simple moral distinction. The more essential and far more difficult distinction is the one between different shades of gray, between degrees of evil. Aggressive environmental activists, for example, or the furious opponents of globalization, may sometimes emerge as violent fanatics. But the evil they cause is immeasurably smaller than that caused by a fanatic who commits a large-scale terrorist attack. Nor are the crimes of the terrorist fanatic comparable to those of fanatics who commit ethnic cleansing or genocide.

Those who are unwilling or unable to rank evil may thereby become the servants of evil. Those who make no distinction between such disparate phenomena as apartheid, colonialism, ISIS, Zionism, political incorrectness, the gas chambers, sexism, the 1 percent's wealth, and air pollution serve evil with their very refusal to grade it. "

― Amos Oz , Dear Zealots: Letters from a Divided Land