From Reflections on the Jewish Question (Part I of Antisemite and Jew).
How can one choose to reason falsely? It is because of a longing for impenetrability.
The rational man groans as he gropes for the truth; he knows that his reasoning is no more than tentative, that other considerations may supervene to cast doubt on it. He never sees very clearly where he is going; he is “open”; he may even appear to be hesitant. But there are people who are attracted by the durability of a stone. They wish to be massive and impenetrable; they wish not to change. Where, indeed, would change take them? We have here a basic fear of oneself and of truth. What frightens them is not the content of truth, of which they have no conception, but the form itself of truth, that thing of indefinite approximation. It is as if their own existence were in continual suspension.
But they wish to exist all at once and right away. They do not want any acquired opinions; they want them to be innate. Since they are afraid of reasoning, they wish to lead the kind of life wherein reasoning and research play only a subordinate role, wherein one seeks only what he has already found, wherein one becomes only what he already was. This is nothing but passion. Only a strong emotional bias can give a lightning‐like certainty; it alone can hold reason in leash; it alone can remain impervious to experience and last for a whole lifetime.
The antisemite has chosen hate because hate is a faith; at the outset he has chosen to devaluate words and reasons. How entirely at ease he feels as a result. How futile and frivolous discussions about the rights of the Jew appear to him. He has placed himself on other ground from the beginning. If out of courtesy he consents for a moment to defend his point of view, he lends himself but does not give himself. He tries simply to project his intuitive certainty onto the plane of discourse. I mentioned awhile back some remarks by antisemites, all of them absurd: “I hate Jews because they make servants insubordinate, because a Jewish furrier robbed me, etc.”
Never believe that antisemites are completely unaware of the absurdity of their replies. They know that their remarks are frivolous, open to challenge. But they are amusing themselves, for it is their adversary who is obliged to use words responsibly, since he believes in words. The antisemites have the right to play. They even like to play with discourse for, by giving ridiculous reasons, they discredit the seriousness of their interlocutors. They delight in acting in bad faith, since they seek not to persuade by sound argument but to intimidate and disconcert. If you press them too closely, they will abruptly fall silent, loftily indicating by some phrase that the time for argument is past. It is not that they are afraid of being convinced. They fear only to appear ridiculous or to prejudice by their embarrassment their hope of winning over some third person to their side.
If the antisemite is impervious to reason and to experience, it is not because his conviction is strong. Rather, his conviction is strong because he has chosen first of all to be impervious.