Melchizedek was king of Salem,which is king of peace,and the priest of the most high God,who blessed Abraham,who Abraham gave a tenth of the spoils of a war he was involved in,tithes,before the Leviticus priesthood.
The Bible says He was without father,without mother,without descent,having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually.
Jesus is not Melchizedek incarnate,and Jesus is not Melchizedek at all,but a priest after the order of Melchizedek,or His priestly office,that exceeds the Leviticus priestly office.
Melchizedek is a bodily manifestation of God,for He is without father,or mother,having neither beginning of days,or end of life,but Melchizedek is not a permanent bodily manifestation of God.
Jesus is the only permanent manifestation of God,and the only bodily manifestation of God,born of a woman,and the only begotten Son of God.
Melchizedek was a temporary manifestation of God,a bodily manifestation made from the dust of the earth,which God appeared the same way to Abraham,with two of His angels,on another occasion.