Tim Keller, in Counterfeit Gods says:
An idol is something we look to for things that only God can give. Idolatry functions widely inside religious communities when doctrinal truth is elevated to positions of a false god. This occurs when people rely on the rightness of their doctrines for their standing with God rather than on God himself and his grace. It is a subtle but deadly mistake. The sign that you have slipped into this form of self-justification is that you become what the book of Proverbs calls a “scoffer”. Scoffers always show contempt and disdain for the opponents rather than graciousness, This is a sign that they do no see themselves as sinners saved by grace. Instead, their trust in the rightness of their views makes them feel superior.
Does that sound personally familiar to you? It has to me. Perhaps not as severely right now, but in the past, definitely. Sometimes we may not even realize that we have placed some of our hope in something other than the Gospel.
Many churches look at the churches around them as competitors, rather than partners. Or theological diversity as a threat to their ministry. I doubt this is anything short of a sense of religious idolatry.
Even if our theology is right, and our church is healthy, our attitudes toward other people’s theological ideas and churches reveal a good deal about what our own thought and theology means to us. “Scoffing” and “disdain” for anyone is not a good thing. But it’s especially revealing when those things are directed at people who share the same salvation we do.

