My review of Chapter 6 of "Misquoting Jesus".

Chapter 6 talks about the Theologically 

Motivated Alterations of the Text.

It talks about the different heresies that plagued the early church in the 2nd and 3rd century.

Heresies:

Adoptionists: Who thought JESUS was only human and had no divine attribute.

Doceticists: Who thought JESUS was only divine and so the human Jesus was a mere appearance rather a real person.

Separationists: Who thought JESUS was both human and divine however they mistook HIS "Nature " for HIS "Being".

So according to them Jesus has two separate beings.

Textual variants to counter these thought lines:

Adoptionists: 1Tim 3:16 "He appeared in flesh"  was changed to "God appeared in flesh"  to avoid the adoptionists so they couldn't claim that Jesus was just a man.

John 1:18 no one has seen G-D, but the unique son/unique god. (Unique god only found in Alexandrian MS)

Doceticists: Luke 22:44 blood sweat was added to show that Jesus was truly human too. 

Luke 22 :17-19 Do this in remembrance of me. 

Separationists: 

Mark 15:34 in a variant reading it says "my God my God why have you mocked me".

Bart wrote this entire chapter to show us that there are theologically motivated changes in the text however the changes mentioned by him does not affect any of our belief in the Bible. It doesn't affect any of the doctrines that we uphold.

Plus these changes were discarded and removed by our scholars and today our modern day english translations doesn't have this readings. 

So Bart here is not just trying to show us the variant readings he actually is trying to deceive the gullible lay christians to make them sceptical of their faith.