I missed this

Christianity really has nothing to do with Judaism
If You mean the Old testament(which you said is barbaric) ?

Sorry to tell you jesus himself Attested to Old testament:

Matthew 5:17-19
17 Dont misunderstand why I have come. I did not come to abolish the law of Moses or the writings of the prophets. No, I came to accomplish their purpose.

18 I tell you the truth, until heaven and earth disappear, not even the smallest detail of Gods law will disappear until its purpose is achieved.

More of Jesus's Attesting to Old testament barbarity:


Matthew 15:4 (English-NIV)--For God said, `Honor your father and mother' and `Anyone who curses his father or mother must be put to death.' Mark 7:10 (English-NIV)--For Moses said, `Honor your father and your mother,' and, `Anyone who curses his father or mother must be put to death.'
The actual Old Testament reference:
Leviticus 20:9 For every one that curseth his father or his mother shall be surely put to death: he hath cursed his father or his mother; his blood shall be upon him.