At best there are two major problems with ideology. The first is that it does not represent or conform to or even address reality. It is a straight-edge ruler in a fractal universe. The second is that it inspires in its believers the notion that the fault here lies with miscreant fact, which should therefore be conformed to the requirements of theory by all means necessary. To the ideologue this would amount to putting the world right, ridding it of ambiguity and those tedious and endless moral and ethical questions that dog us through life, and that those around us so rarely answer to our satisfaction. Anger and self-righteousness combined with cynicism about the world as he or she sees it are the marks of the ideologue. There is always an element of nostalgia, too, because the ideologue is confident that he or she is moved by a special loyalty to a natural order, or to a good and normative past, that others defy or betray.
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To put it another way, we have entered a period of rationalist purgation. Rationalism and reason are antonyms: the first is fixed and incurious; the second, open and inductive. Rationalism is forever settling on one model of reality; reason tends toward an appraising interest in things as they come. Rationalism projects, and its projections typically fill it with alarm because of the inadequacy of its model, which, to the rationalist mind, appears as the perversity of the world. To this mind every problem is systemic, therefore vast and urgent. Rationalism is the omnium-gatherum of resentment and foreboding, the omnium-scatterum of everything of any kind that appears to stand in the way of a correction of reality back toward rational standards. Like paranoia, it all makes perfect sense, once its assumptions are granted. Again, like paranoia, it gathers evidence opportunistically, and is utterly persuaded by it, fueling its confidence to the point of sometimes messianic certainty. Ideology is rational, a pure product of the human mind.