As I remember Kakos is the Greek term for “Bad.” My point by describing a person as “Bad” rather than “Evil” makes them more manageable especially as a “Bad” person is usually deficient in some quality or qualities. The term “Evil” places its recipient in a class manageable by God. We live in a human world. For example Satan is “Evil” can you imagine a human trying to manage him? However, I don’t insist.
I don’t understand where that pedantry comes from, with all due respect.
The modern English word “evil” comes from Anglo-Saxon “yfel”, which itself means “bad” in our modern sense; as do other such derived words as German “übel”.
Now the word “bad” is presumed to be derived from Anglo-Saxon “baeddel”, which actually means “hermaphrodite”. Perhaps this word is a misnomer?