Is killing a witch always a bad thing?

[Optimistic Mysanthrope]

I think it's fair to say that the general consensus is that whether or not someone is a witch is irrelevant when discussing the morality of killing

Edited due to appalling sentence structure

Now that the morality of killing a witch has been put aside, would you then go after or hunt a witch? What would it take to get to that point?

Well, it's not really a case of setting aside the morality of killing a witch. It's more a case of setting aside being a witch when discussing whether or not it can be moral to kill. In that regard, I think my limits would be the same as many other people. I couldn't really give you a list of criteria, since it would depend on situation, context, certainty of guilt, reliability of the judicial system in the matter etc....