From Os Guiness, an evangelical Christian, “Fit Bodies, Fat Minds: Why Evangelicals don’t think and what to do about it” ( Baker Books; Grand Rapids:1994)

p. 143

A fourth misconception concerns the idea that thinking Christianly is a form of uniformity – in other words, that if we all think Christianly we will all think the same way. Whe this happens, the goal of thinking Christinly collapses into a frantic search for the one particular correct way of thinking or acting. The result is he fallacy of “particularism”, the uniformity of a particular “Christianly Correct” way of thinking. …[particularism] denies two requirements of thinking Christianly that oppose all uniformity: the importance of diversity and the fact of human fallibility.

p. 143 – 144

For another thing, applying the idea of uniformity is disastrous because it leads inevitably to legalism and judgementalism. There is only a short and easy step from “This is the Christian way” to “There is only one Christian way” to “Anything different from this Christian way is not Christian” to “All those who differ fom my way are not Christians”.