There’s an infuriating thing which consequentialists do where they say that life is never black and white, it’s all shades of grey. For a long time I thought that this was just because they wanted to be evil without being caught, and were trying to disguise it. This may still be the case, but I realized that this is actually inherent in their position.
Consequentialism means judging an action as good or evil not by principles—i.e. not by what the action is—but only by the consequences of the action. To a consequentialist it doesn’t mean anything to say “it is impermissible to do evil that good may result” since, according to their moral theory, if good results, it wasn’t evil that you did. So rape, treason, murder, etc. are all to be judged on the basis of whatever good or evil comes out of them, not on whether they are intrinsically evil.
There is a problem with consequentialism, which is that one cannot foresee all the consequences to an action. In fact, one cannot foresee most of the consequences to an action. In fact, people often have trouble foreseeing even the very immediate consequences to their actions. This makes consequentialism impossible for a human being to actually evaluate, rendering it completely useless as a moral theory.
(As a side-note, consequentialism and principalism are identical in God, since he both knows all of the effects of all actions and created the world such that the consequences of principled actions are good. Consequentialism is completely un-evaluatable for anyone who is not God, however.)
But, while this is completely useless as a moral theory for making decisions, it can be applied somewhat better historically. Not actually well, of course, but at least better. And this is where the consequentialist sees everything as shades of grey. Every action has both good and bad consequences. This is intrinsic, because every action opens up some possibilities and forecloses others. To marry one woman is to not marry all of the others. To save a man’s life in the hospital is to take money from the undertaker. To save the life of a worm who crawled onto the pavement is to deprive the ants of food who would have ate its corpse. Every action disappoints someone. And this much, the consequentialist can see in hindsight.
And since, to a consequentialist, (naturally) good consequences are identical to an action being (morally) good, and (naturally) evil consequences are identical to an action being (morally) evil, an action having both naturally good and naturally evil consequences makes the action both morally good and morally evil. Since all actions, intrinsically, have both naturally good and naturally evil consequences, all actions must, to the consequentialist, be a mixture of moral good and moral evil.
This disguising the consequentialist’s own evil is just a side-benefit.