It matters that much.
Or we could discuss our need to divide over many others things in fandom. If I root for one sports team, it necessarily means the fans of the opposing team are morons. Men vs Women, Star Wars vs Star Trek, DC vs Marvel, PC vs Mac, Catholic vs Protestant, Republican vs Democrat, Alien vs Predator. Okay, clearly some of those are more important than others.
But the point is that we seem to enjoy drawing up the battle lines and standing divided. It's kind of stupid really, but acknowledging our penchant to divide doesn't automatically bring us together. It's merely one more way of noticing our differences and trying to decide who is better at..well, anything.
For Christians, this is extremely problematic. I've argued over the past two days, here and here, that truth matters. It certainly does, which is why we Christians have found many, many things to be divided over. And it's not a new problem.
My fear is that we will take the many issues, many of which can be interpreted with careful readings of Scripture and we will elevate these stands to something more than they were ever meant to be. The Apostle Paul said it most succinctly when he wrote this;
For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures, and that he appeared to Cephas, and then to the Twelve. After that, he appeared to more than five hundred of the brothers and sisters at the same time, most of whom are still living, though some have fallen asleep. Then he appeared to James, then to all the apostles, and last of all he appeared to me also, as to one abnormally born. ~1 Corinthians 15:3-8
We need to realize that only Christ matters. This means that nothing else matters. We nod along with those last two sentences. But it means that no other human standard matters, not even just the one I think matters. This doesn't take away the importance of truth. It simply makes us all more civil toward one another as we all search for the truth.