At first you classify anybody whom you want to look down on as evil.
He does what is wrong. He is bad!
After all, 'good and evil' has only 2 categories, namely, 'good' and 'evil'. It is sooo rough that classifying anyone as evil is very easy.

N.B
The above illustration with devil marks is the one used in ‘Which?’ picture book. 'Which?' shows the process where one classifies all mankind as evil.

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