Kyle Strobel, over at Theology Forum has an excellent post on being a healthy church movement. His criticism below should not be directed at evangelicalism exclusively. See here for the full post.
"I have been thinking, as of late, about the various strategies in evangelicalism to navigate the marketplace of ideas. It seems to me that the typical evangelical strategy to “win” (sorry, I don’t mean this to be polemical (yet) but I can’t think of another word which is accurate), is simply to create something of a boys club. In other words, we surround ourselves with people who both agree with every word that comes our of our mouth and who won’t actually attack our views in any significant way. This is enough, in itself, to be idolatry, but it rarely stops there. The next step is to start a movement. A movement, in these terms, is nothing more than simply organizing leadership and adopting worldly strategies for kingdom building. Once teaching, leadership and dogma can be disseminated, there is a twofold turn outwards: First, a turn outwards to evangelize – not Christ as much as the movement itself - and, second, a turn outwards to attack anyone who thinks differently. The latter turn stems from the inherent fundamentalism in evangelicalism which equates difference with danger."