What is the biblical evidence against a pre-incarnate Jesus? According to groups that reject Jesus having a pre-incarnate existence, what Biblical evidence do they cite for the position that Jesus, the Messiah, did not exist prior to his conception in Mary's womb by the Holy Spirit? In particular what groups hold this position and what common  ground do they share in their evidence for it?
Evidence for denying a pre-incarnate son

There are a number of verses, but for now, I'll focus on one the majority of Christians look to, and that's John 1:1. The way a trinitarian might understand this verse is that the word is God's son. A unitarian understands the word as the word that is personified by John, similarly to the way wisdom is personified in Proverbs 8:22-31. Here are few verses regarding God's word personified.


God spoke to create the Universe. (Genesis 1; Psalm 33:6, 9)
God's word is sent out to accomplish that which God wills. (Isa. 55:10, 11)


Jesus' pre-existence and biblical unitarian positions

Jesus the man and messiah is made a reality when the word became flesh. (John 1:14) When it comes to biblical unitarianism, there are different views. One common belief they all hold is that Jesus isn't the god known as Yahweh. This belief in a single, unipersonal god is exclusive to the Father.