Recently an American acquaintance of mine told me that, when asked, he informed a group of students that he did not believe animals had rights, and this deeply shocked them. They did not merely disagree with him: they simply could not take on board that any intelligent, sane, and civilized person could hold such a view. It was as if someone had gone to Mecca and said there is no God and therefore Mohammed could not have been his prophet.
One of the characteristics of our age that may surprise future social historians (if there are any) is the speed with which ideas go from being generally regarded as ludicrous and unthinkable to being conceivable, then accepted, then ensconced as unchallengeable orthodoxy. This makes it difficult for satirists; satire becomes prophecy and, in practically no time at all, mere description.