Kim Kardashian really upset the executor of O.J. Simpson 's estate ... and, now he's throwing low blows at her -- insulting the reality star for failing the bar exam in California! Here's the deal ... the fourth episode of the new "The Kardashians" season came out Thursday -- and part of it focuses on Kardashian attempting to buy the Bible her dad, Robert Kardashian , wrote an inscription in and gave to O.J. Simpson shortly after Juice's arrest. The clip shows Kim talking to Ollie Ayling -- a