As is the case with any non-rationalist who believes they know literally anything rather than just perceiving or assuming it, Gordon thinking he is justified for making assumptions is already hypocritical. Now, hypocrisy is a recurring focus of the show. One character after another says or does asinine things that contradict certain beliefs they have previously espoused—or, in the case of beliefs, that contradict the objective truths of logic. The Winchester brothers themselves are chief examples within the early seasons alone, but the hunter Gordon's delusional reason for pursuing even vampires who do not harm humans is among the first overt examples. Believing he is treating vampires as they deserve does not make his reason for doing so valid. It would actually be the other way around, if his exact reason was correct.
Gordon displays a much more insidious form of hypocrisy in the third season, however, once he is involuntarily turned into a vampire himself. Becoming a vampire or some other non-human creature against one's will is already terrible enough. That Gordon hated and feared vampires to the point of stereotyping them as aggressive towards humans would certainly add layers to the existential terror that overcomes him as his metaphysical transformation leaves him yearning for blood with the full intensity of a craving he has yet to master. Rather than abruptly change his belief about vampires deserving to die because it is no longer as personally convenient, he tells a fellow hunter that he, the hunter, must kill him, Gordon—once he kills Sam Winchester for ostensible affiliation with demons.
Gordon remains consistent with his anti-vampire worldview in this regard, although some of his beliefs about vampires beforehand were still inconsistent with reason itself, in part because he only believed them on the basis of assumptions. Where he lapses into sheer hypocrisy regarding even his own somewhat irrationalistic philosophy is in turning a woman into a vampire so that Dean Winchester will be distracted by an attacker as Gordon attempts to eliminate Sam. Typifying how extreme circumstances often bring people, and people who are already fools all the more, to the point of inconsistency between one belief and another or between belief and action, his decision parallels things far more relatable than making another vampire.
If being a vampire is so evil—and it would be certain actions a conventional vampire must take to survive that are evil, not simply being a vampire against one's wishes—then it would of course be immoral to make someone else a vampire to distract an enemy. Gordon betrays his own philosophy here. He remains consistent enough to not pretend like he would be an exception if all vampires deserve to die, but he seems to think turning a human into a vampire against their will for utilitarian purposes is permissible in his situation, despite creating another monster he regards as abominable and harming one of the non-hunter humans he supposedly strives to protect.
And yes, Biblically, a true human-turned-vampire or equivalent being would morally have to be put to death even if they never killed anyone but only drank the blood of any creature to live [1] (if they could somehow survive without resorting to the sin, then this does not apply). Not even the blood of a subhuman animal can be legitimately consumed except by other such animals. So, Gordon is ironically in alignment with Biblical theology on this (Genesis 9:4, Leviticus 17:10-14, etc.), even though Biblical theology is wildly different from what mouthpiece characters in Supernatural say about it (hell, justice, demons, eschatological seals, etc.), and even though he is by no means a rational person who makes no assumptions and holds no beliefs for personal reasons as opposed to strict logical necessity. He simply dislikes vampires, attributing malicious actions and intentions to every single one them irrationally and unjustly, when the sin of eating any blood is already enough to deserve capital punishment even if it is not from humans. And then he as a vampire does to an extent exactly what he hated them for and ascribed to all of them in the first place.
Through Gordon, viewers see an example in fiction of a person who is comfortable with arbitrarily deviating from either what is true or what they merely but sincerely believe is true because of emotion or convenience. How very much like the typical person! Put them in the right circumstances, and their perhaps already irrational beliefs will fail to constrain their behaviors, even as they might still profess or hold to those beliefs. The central allure of utilitarianism is precisely that one can supposedly be absolved of guilt by bringing about a certain goal because the situation or the outcome would somehow override moral duties to act or not act in certain ways. Whether he is driven primarily by emotionalism or utilitarianism when he transforms the woman, it would not matter. He is in the wrong just by being a hypocrite separate from the irrationality he had already clung to before becoming a vampire.
























