I've been considering this today, since the existence of a conspiracy seems increasingly unlikely to me.
Let me refer to a theory common among evolutionary biologists about one facet of trait conscientiousness, sensitivity to disgust. Theoretically, this trait offered an evolutionary advantage because it would make a given population more wary of outside groups, which could potentially infect them with contagious diseases. At the individual level, this trait offers similar benefits, deterring (for example) promiscuity and other deviant sexual practices through which sexually transmitted diseases spread. Of course, this trait would manifest in other behaviors and attitudes which are not strictly tied to literal diseases; those who are highly sensitive to disgust are going to care greatly about sanctity and purity, while those low on the trait will disregard such values.
Now, let's think about how this relates to the Jew. For time immemorial, the Jew has been spread across the lands, with no home of his own. Since the middle ages, Jews lived in European countries in their isolated pockets. From an evolutionary perspective, I would hypothesize it would have been advantageous for these Jews to suppress their natural sensitivity to disgust in order to thrive in these alien countries. While it might have been natural for such groups to fear being "contaminated" by the larger population, Jews couldn't afford to entertain such fears. Over the centuries, this could result in a sensitivity to disgust among Jews which is abnormally low.
Such an evolutionary process could explain the role of the Jew in the modern world in constantly promoting degeneracy such as cucking, multiculturalism, and pornography. It's not necessarily a conspiracy, just a mindset molded by evolution which is immune to ideas of purity and sanctity.