Albert Camus, in Resistance, Rebellion and Death wrote…

…What the world expects of Christians is that Christians speak out loud and clear, and that they should voice their condemnation in such a way that never a doubt, never the slightest doubt, could rise in the heart of the simplest man.  That they should get away from abstraction and confront the blood-stained face history has taken on today.  The grouping we need is a grouping of men resolved to speak out clearly and pay up personally (1961, p. 71).