Several verses in the Bible speak of the importance of unity of all believers. The reality is that there are many different denominations and multiple points of debate within the body of Christ. But does this necessarily mean the body of Christ has to be divided? God wants us to be one, but I do not think he expects us all to believe the same in every area.
Concerning debate among Christians, for instance, in the blogosphere, at what point does that become division? I think it is important to have discussions with believers with some different opinions, but does it only stir up contention? Is it when friendly discussion is no longer so?
Just a few thoughts on my mind.