From "The Black Book of the American Left" (2013), by David Horowitz:
To be a conservative is first to understand that there is no solution to the dilemmas of the human condition. Second, it is to understand that to escape these dilemmas, human beings will inevitably embark on desperate quests for redemptions in this life. These redemptions, in turn, will require holy wars to purge the world of demons—of those who do not share their faith, and who stand in their way. In this regard, totalitarian Islam is really no different in its heart from totalitarian socialism or progressivism, even though the latter are secular and the former is pursued in the name of a vengeful and malignant God. Both seek to cleanse mankind of its irreparable imperfections.
To remain free beings, we are continually forced to defend ourselves and our breathing space, against the efforts of the redeemers to perfect us—against the armies of the saints who are determined to make the world a better place than it can ever be. That is how I see the political wars we face, and why they will never end.