Do not allow a sorceress/witch to live?

I saw a witch a while back being mistreated, which deeply troubled me. I am strong proponent for Luke 6:31 . I am familiar with Exodus 22:18 which usually translates to something like: Do not allow a sorceress/witch to live. This brings to mind one main question: * Is there anything in the Bible suggesting a better way to interpret this? Are Christians expected to commit murder? I understand innumerable witches have been murdered over the millennia but this is just not acceptable to me. The society I live in deems this illegal as well. Then I have two sub-questions: 1. Is there a biblical difference between witches and sorceresses? I know there are witches out there but I have not met a sorceress. 1. In the Bible is the word sorceress truly gender specific? e.g. male sorcerers are exempted from this? I am trying to reconcile this with other portions of the Bible that denounce the mistreatment of others. Answers that cite more clear and easily understandable Bible passages will get preferential treatment for approval. The sub-questions are optional but will count towards approval should all other elements of the answer be deemed equal.