As long as he gives us his definition of "natural evil" by using the examples, what is your problem? Oh I know, pedantry.
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Prove it is evil. Why is a thing that protects a spider evil?? It's up to him to prove it. Then I will believe it is evil. Until you or he proves it is "evil" I refuse to believe it.
Currently this looks to me to be something like the following:
OP: "This person is evil!!"
Me: "I don't think that person is evil."
You: "But he defined that person is evil, therefore he IS EVIL!! To deny this is pedantry!!"
Or how about...
OP: "The sky is yellow!!"
Me: "I don't think the sky is yellow."
You: "But he defined yellow as the color of the sky, therefore the sky is yellow!! To deny this is pedantry!!"
Linguistic subjectivity is dumb. And that is what you seem to be advocating here. Prove your adjectives fit the nouns, don't just declare that your adjectives are defined as being the nouns.
So spider venom is evil?? Prove it. Otherwise just be quiet, don't assert I should blindly accept your definitions of words with no evidence.