If you approve of bank robbery, you won’t be able to condemn the act of shoplifting candy bars from a convenience store. I mean, you won’t be able to do this if you are to be logically consistent. If you approve of a greater evil, you can’t logically condemn lesser evils of the same genus.
Likewise, if you approve of murder you cannot, if you wish to retain your reputation for logical consistency, condemn assault and battery.
Again, if you are a Catholic who approves of adultery, you cannot very well condemn contraception and fornication.
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