Deuteronomy 17:12
Does it say?
First of all the word "man" used has the sense of "mighty man". http://concordances.org/hebrew/vehaish_376.htm
It means if a man is presumptuous so that he won't hear (to obey) then he is against the priest (principal officer) so then if he should seek to minister (assist, contribute) there (at the temple) it is the order of YHWH that he not judge for destroy is what he will do to this (Holiness).
That is why the command is KNOW YHWH. Then the scripture takes the correct meaning.
It is a difficult scripture. THINK OBVIOUS. It means a presumptuous man must not be allowed to judge Israel. The priests judged, remember?
It does not say "put the man to death". Know YHWH.
I'm tired. I'm not going to dissect the other one.