After all, didn't Jesus warn us?
Well, okay, he probably wasn't talking about the kinds of disputes I have noticed, but he did say that peace was not the ultimate good. He didn't intend to paper over disagreement over essential matters or to ignore what was wrong.
In my own lifetime, church congregations have been split over civil rights and the Vietnam War. Many churches today have internal disputes about ordination of women and inclusion of gays and lesbians.
He did not come to bring peace. He lived a life that brought him to crucifixion. Taking him seriously, taking his message seriously, taking the decisions he made seriously will disrupt our lives. We don't join the church for the same reason we would join some kind of social club. We join the church to continue his work in the world. And sometimes, that work is scary.