The Bible has to be read in order.
Eg divorce was acceptable in the Old Testament but not in the New. God commands Abraham to kill Issac in Genesis (though this is a test). In Exodus which follows the 10 Commandments are given. Where after this point does God specifically tell someone to kill someone else? (though I agree the kill / murder distinction is an important one. My immune system is killing countless organisms right now)
In this context the question is
"Are they right or just schizophrenic?" - I'm not sure there's much you can say to either though.
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