He's suggesting catholics have altered the word of the lord, or so I've interpreted.
Unfortunately, that's true to some extent. There is no copy of the Bible in it's original form in existance. It's believed that there are somewhere around 70 different variations of the Bible that have come before the one we know today. As such, it is safe to say that certain stories have been altered, added, or omitted as certain people interpret it differently. History gives us a good example of that with the creation of the Anglican Church by King Henry VIII of England, having separated from the Catholic Church when the Pope refused to allow him to divorce Queen Catherine.