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"so if it's fine by them, then it is!" What an insane way to think.

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.