From D. A. Carson, The Cross and Christian Ministry, 63-64:
I have heard a Mennonite leader assess his own movement in this way. One generation of Mennonites cherished the gospel and believed that the entailment of the gospel lay in certain social and political commitments. The next generation assumed the gospel and emphasized the social and political commitments. The present generation identifies itself with the social and political commitments, while the gospel is variously confessed or disowned; it no longer lies at the heart of the belief system of some who call themselves Mennonites.
Whether or not this is a fair reading of the Mennonites, it is certainly a salutary warning for evangelicals at large. We are already at the stage where many evangelical leaders simply assume the message of the cross, but no longer lay much emphasis on it. Their focus is elsewhere. And a few, it seems to me, are in danger of distancing themselves from major components of the message of the cross, while still operating within the context of evangelicalism.
It is at least possible that we are the generation of believers who will destroy much of historic Christianity from within – not, in the first instance, by rancid unbelief, but by raising relatively peripheral questions to the place where, functionally, they displace what is central. And what shall the end of this be?
We must come back to the cross, and to God’s plan of redemption that centers on the cross, and make that the point of our self-identification.