"...contradictions and so on".   I seriously doubt that you EVER studied scripture. As someone who has studied for 2+ decades using Hebrew and Greek concordances and other critical texts, I'd love to see "what" contradictions you speak of.  BTW, the old covenant has been dead for nearly 2 millennia.  It was replaced by the Lord Himself with the new covenant. The Jews ignore that fact so if you want to see who's keeping the old testament extant then you have only them to blame for that.