why not less? I think many see the "facts" as different. Their approaches to the texts are different, but "Christians" align themselves in someway with a entity called "Jesus". Different sects of Christianity tend to have their own definitions of what they think being a "christian" means and there are commonalities from sect to sect, and even some groups of sects have lots of strong commonalties, but there are still many ways they have incompatible beliefs as well. wikipedia has a reasonable list https://en.wikipedia.org/wiki/List_of_Christian_denomination... and I'm pretty sure some "christians" in one of the sects would go "They aren't christians!" when it comes to other sects in that list.