In the course of my personal Bible study (and I don't mean what the WTS would like me to learn), I have found that:
Yes, as Terry says, there was more than one group of Jews and more than one group of Christians, and, like Celsus (http://en.wikipedia.org/wiki/Celsus>/a>) said, Christians were always fighting each other and killing each other. Finally one group of Christians was able to jump onto the Constantine Wagon and they became the Catholic Church.
Doubts that come to my mind:
1)
I suspect that Constantine needed an ally that would make sense. That's why it was he who promoted the Canon. He couldn't have cared less what the canon was, as long as there was one he could stick to. That's why he argued that"Homoousios" thing (http://www.quotes.orthodoxwiki.org/Homoousios). Former Catholics might also remember this was when the Filioque thing came up (http://en.wikipedia.org/wiki/Filioque.
2)
How do we know that the Bible wasn't tampered with later, by mistake or wilfully? The Comma Johanneum was when Erasmus of Rotterdam was forced to support the idea of the trinity with anything, and he added a few strings to the Bible. I wonder if anyone added anything else at some other point, and no one knew.
3) (the one that motivates this post): Now it happens that we have always had more than one version of the Bible.
4) Then we have all the translators adding their biases.
I'm sorry, but, for me, the idea that the Bible is the inerrant word of God has suffered a very serious blow. And I'm leaving out stuff such as, for example, God's wonderful behavior towards the Midianites (Number 31: 15-18). Or inconsistencies such as Jesus saying different things while being crucified / held in the torture stake. Let me add the vested interests of churches and churchmen (almost invariably it has been men), their interests in the Kingdom of this World, et cetera, and, sorry, I don't have much trust left for Christians. I can appreciate the value of many, including well-meaning Jehovah's witnesses, but... the whole idea has suffered a serious blow.
The article wants Christians and Jews to take it easy in view of the fact that no one seems to have the inerrant word of God. I wish everyone took it easy and stopped killing, shunning or otherwise disposing of "infidels".