Now that is a rather disturbing quote. In other words, if he kills someone, it'll be because God told him to?
I not very familiar with the Phinehas Priesthood. What do you know about it?
On the subject of hearing God's word to terminate another human being, one would be skeptical if one claims they heard such a word. Most likely, it came from one's self, which is subject to error. God's word is that of love and compassion for one's fellow man. If someone claims that God told them to kill someone, they failed to listen to the true word of God. One can only know that true word through constant prayer and reading the Bible.