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The point he is trying to make is that Spartans don't find it evil.
Therefore it cannot be universally evil if some people are doing it.

I know. So Hitler's SS were not doing evil either.

Obviously for many people they were evil. For others (e.g SS) were actions to make the planet a better place.

post-modernism at it's best.

For a person who claims to want to have a philosophical conversation you use a lot of labels just to get away with actual arguments.